From a936aea3a10875761cc0209e4cc8854f10c570b4 Mon Sep 17 00:00:00 2001
From: Laurie Marceau <lmarceau@mozilla.com>
Date: Tue, 6 Feb 2024 15:18:34 -0500
Subject: [PATCH 01/10] Add find in page in engine session

---
 .../Scripts/FindInPageContentScript.swift     | 51 +++++++++++++++++++
 .../Scripts/WKUserScriptManager.swift         |  6 +--
 .../WebEngine/WKWebview/WKEngineSession.swift |  8 +++
 3 files changed, 62 insertions(+), 3 deletions(-)
 create mode 100644 BrowserKit/Sources/WebEngine/WKWebview/Scripts/FindInPageContentScript.swift

diff --git a/BrowserKit/Sources/WebEngine/WKWebview/Scripts/FindInPageContentScript.swift b/BrowserKit/Sources/WebEngine/WKWebview/Scripts/FindInPageContentScript.swift
new file mode 100644
index 000000000000..ca7c4a7abc50
--- /dev/null
+++ b/BrowserKit/Sources/WebEngine/WKWebview/Scripts/FindInPageContentScript.swift
@@ -0,0 +1,51 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/
+
+import Common
+import Foundation
+import WebKit
+
+protocol FindInPageHelperDelegate: AnyObject {
+    func findInPageHelper(_ findInPageContentScript: FindInPageContentScript, didUpdateCurrentResult currentResult: Int)
+    func findInPageHelper(_ findInPageContentScript: FindInPageContentScript, didUpdateTotalResults totalResults: Int)
+}
+
+class FindInPageContentScript: WKContentScript {
+    weak var delegate: FindInPageHelperDelegate?
+    private var logger: Logger
+
+    init(logger: Logger = DefaultLogger.shared) {
+        self.logger = logger
+    }
+
+    class func name() -> String {
+        return "FindInPage"
+    }
+
+    func scriptMessageHandlerNames() -> [String] {
+        return ["findInPageHandler"]
+    }
+
+    func userContentController(
+        _ userContentController: WKUserContentController,
+        didReceiveScriptMessage message: WKScriptMessage
+    ) {
+        guard let parameters = message.body as? [String: String],
+              let token = parameters["appIdToken"],
+              token == DefaultUserScriptManager.appIdToken else {
+            logger.log("FindInPage.js sent wrong type of message",
+                       level: .warning,
+                       category: .webview)
+            return
+        }
+
+        if let currentResult = parameters["currentResult"], let result = Int(currentResult) {
+            delegate?.findInPageHelper(self, didUpdateCurrentResult: result)
+        }
+
+        if let totalResults = parameters["totalResults"], let result = Int(totalResults) {
+            delegate?.findInPageHelper(self, didUpdateTotalResults: result)
+        }
+    }
+}
diff --git a/BrowserKit/Sources/WebEngine/WKWebview/Scripts/WKUserScriptManager.swift b/BrowserKit/Sources/WebEngine/WKWebview/Scripts/WKUserScriptManager.swift
index afd1af0ded54..7745e6370f1c 100644
--- a/BrowserKit/Sources/WebEngine/WKWebview/Scripts/WKUserScriptManager.swift
+++ b/BrowserKit/Sources/WebEngine/WKWebview/Scripts/WKUserScriptManager.swift
@@ -12,7 +12,7 @@ protocol WKUserScriptManager {
 
 class DefaultUserScriptManager: WKUserScriptManager {
     // Scripts can use this to verify the application (not JS on the web) is calling into them
-    private let appIdToken = UUID().uuidString
+    static let appIdToken = UUID().uuidString
     private let scriptProvider: UserScriptProvider
     var compiledUserScripts = [String: WKUserScript]()
 
@@ -68,7 +68,7 @@ class DefaultUserScriptManager: WKUserScriptManager {
     private func injectFrameScript(name: String, userScriptInfo: UserScriptInfo) {
         guard let source = scriptProvider.getScript(for: name) else { return }
 
-        let wrappedSource = "(function() { const APP_ID_TOKEN = '\(appIdToken)'; \(source) })()"
+        let wrappedSource = "(function() { const APP_ID_TOKEN = '\(DefaultUserScriptManager.appIdToken)'; \(source) })()"
         // Create in default content world
         let userScript = WKUserScript(source: wrappedSource,
                                       injectionTime: userScriptInfo.injectionTime,
@@ -81,7 +81,7 @@ class DefaultUserScriptManager: WKUserScriptManager {
         let webcompatName = "Webcompat\(name)"
         guard let source = scriptProvider.getScript(for: webcompatName) else { return }
 
-        let wrappedSource = "(function() { const APP_ID_TOKEN = '\(appIdToken)'; \(source) })()"
+        let wrappedSource = "(function() { const APP_ID_TOKEN = '\(DefaultUserScriptManager.appIdToken)'; \(source) })()"
         // Create in page content world
         let userScript = WKUserScript(source: wrappedSource,
                                       injectionTime: userScriptInfo.injectionTime,
diff --git a/BrowserKit/Sources/WebEngine/WKWebview/WKEngineSession.swift b/BrowserKit/Sources/WebEngine/WKWebview/WKEngineSession.swift
index ddce0e223236..5d875ca8312c 100644
--- a/BrowserKit/Sources/WebEngine/WKWebview/WKEngineSession.swift
+++ b/BrowserKit/Sources/WebEngine/WKWebview/WKEngineSession.swift
@@ -45,6 +45,7 @@ class WKEngineSession: NSObject,
         webView.navigationDelegate = self
         webView.delegate = self
         userScriptManager.injectUserScriptsIntoWebView(webView)
+        addContentScripts()
     }
 
     // TODO: FXIOS-7903 #17648 no return from this load(url:), we need a way to recordNavigationInTab
@@ -221,6 +222,13 @@ class WKEngineSession: NSObject,
         }
     }
 
+    // MARK: - Content scripts
+
+    private func addContentScripts() {
+        let findInPage = FindInPageContentScript()
+        contentScriptManager.addContentScript(findInPage, name: FindInPageContentScript.name(), forSession: self)
+    }
+
     // MARK: - WKUIDelegate
 
     func webView(_ webView: WKWebView,

From fc006b94c2a9dc85a0fdf5ae9f23b6f212288be1 Mon Sep 17 00:00:00 2001
From: Laurie Marceau <lmarceau@mozilla.com>
Date: Wed, 7 Feb 2024 10:15:49 -0500
Subject: [PATCH 02/10] Add tests

---
 .../Sources/WebEngine/WKWebview/WKEngineSession.swift    | 5 +++--
 .../WebEngineTests/Mock/MockWKContentScriptManager.swift | 5 +++++
 .../Tests/WebEngineTests/WKEngineSessionTests.swift      | 9 +++++++++
 3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/BrowserKit/Sources/WebEngine/WKWebview/WKEngineSession.swift b/BrowserKit/Sources/WebEngine/WKWebview/WKEngineSession.swift
index 5d875ca8312c..ca48ca664815 100644
--- a/BrowserKit/Sources/WebEngine/WKWebview/WKEngineSession.swift
+++ b/BrowserKit/Sources/WebEngine/WKWebview/WKEngineSession.swift
@@ -225,8 +225,9 @@ class WKEngineSession: NSObject,
     // MARK: - Content scripts
 
     private func addContentScripts() {
-        let findInPage = FindInPageContentScript()
-        contentScriptManager.addContentScript(findInPage, name: FindInPageContentScript.name(), forSession: self)
+        contentScriptManager.addContentScript(FindInPageContentScript(),
+                                              name: FindInPageContentScript.name(),
+                                              forSession: self)
     }
 
     // MARK: - WKUIDelegate
diff --git a/BrowserKit/Tests/WebEngineTests/Mock/MockWKContentScriptManager.swift b/BrowserKit/Tests/WebEngineTests/Mock/MockWKContentScriptManager.swift
index 161ce93fa6ba..7cb71681d480 100644
--- a/BrowserKit/Tests/WebEngineTests/Mock/MockWKContentScriptManager.swift
+++ b/BrowserKit/Tests/WebEngineTests/Mock/MockWKContentScriptManager.swift
@@ -12,15 +12,20 @@ class MockWKContentScriptManager: NSObject, WKContentScriptManager {
     var uninstallCalled = 0
     var userContentControllerCalled = 0
 
+    var savedContentScriptNames = [String]()
+    var savedContentScriptPageNames = [String]()
+
     func addContentScript(_ script: WKContentScript,
                           name: String,
                           forSession session: WKEngineSession) {
+        savedContentScriptNames.append(name)
         addContentScriptCalled += 1
     }
 
     func addContentScriptToPage(_ script: WKContentScript,
                                 name: String,
                                 forSession session: WKEngineSession) {
+        savedContentScriptPageNames.append(name)
         addContentScriptToPageCalled += 1
     }
 
diff --git a/BrowserKit/Tests/WebEngineTests/WKEngineSessionTests.swift b/BrowserKit/Tests/WebEngineTests/WKEngineSessionTests.swift
index 9998ba6ab2a9..74247b68ad9b 100644
--- a/BrowserKit/Tests/WebEngineTests/WKEngineSessionTests.swift
+++ b/BrowserKit/Tests/WebEngineTests/WKEngineSessionTests.swift
@@ -407,6 +407,15 @@ final class WKEngineSessionTests: XCTestCase {
 
     // MARK: Content script manager
 
+    func testContentScriptGivenInitContentScriptsThenAreAddedAtInit() {
+        let subject = createSubject()
+
+        XCTAssertEqual(contentScriptManager.addContentScriptCalled, 1)
+        XCTAssertEqual(contentScriptManager.savedContentScriptNames.count, 1)
+        XCTAssertEqual(contentScriptManager.savedContentScriptNames[0], FindInPageContentScript.name())
+        prepareForTearDown(subject!)
+    }
+
     func testContentScriptWhenCloseCalledThenUninstallIsCalled() {
         let subject = createSubject()
 

From c9eab0455962e011b4df3a1e69debc32c0eeaa86 Mon Sep 17 00:00:00 2001
From: Laurie Marceau <lmarceau@mozilla.com>
Date: Wed, 7 Feb 2024 11:44:18 -0500
Subject: [PATCH 03/10] Integrate find in page, add missing functionalities

---
 .../Sources/WebEngine/EngineSession.swift     |  12 +-
 .../Scripts/FindInPageContentScript.swift     |  30 ++-
 .../Scripts/WKContentScriptManager.swift      |   6 +-
 .../WebEngine/WKWebview/WKEngineSession.swift |  16 ++
 .../SampleBrowser.xcodeproj/project.pbxproj   |  32 +++
 .../chevronDownLarge.imageset/Contents.json   |  12 ++
 .../chevronDownLarge.pdf                      | Bin 0 -> 1022 bytes
 .../chevronUpLarge.imageset/Contents.json     |  12 ++
 .../chevronUpLarge.pdf                        | Bin 0 -> 965 bytes
 .../crossMedium.imageset/Contents.json        |  12 ++
 .../crossMedium.imageset/crossMedium.pdf      | Bin 0 -> 1034 bytes
 .../Engine/Scripts/AllFramesAtDocumentEnd.js  |   1 +
 .../Scripts/AllFramesAtDocumentStart.js       |   1 +
 .../Engine/Scripts/MainFrameAtDocumentEnd.js  |   1 +
 .../Scripts/MainFrameAtDocumentStart.js       |   2 +
 .../WebcompatAllFramesAtDocumentStart.js      |   1 +
 .../UI/Browser/BrowserViewController.swift    |  30 ++-
 .../UI/Components/FindInPage.swift            | 191 ++++++++++++++++++
 .../SampleBrowser/UI/RootViewController.swift |  54 ++++-
 .../UI/Settings/SettingsDelegate.swift        |   1 +
 .../UI/Settings/SettingsViewController.swift  |   2 +-
 .../xcshareddata/swiftpm/Package.resolved     |  27 ---
 22 files changed, 399 insertions(+), 44 deletions(-)
 create mode 100644 SampleBrowser/SampleBrowser/Assets.xcassets/chevronDownLarge.imageset/Contents.json
 create mode 100644 SampleBrowser/SampleBrowser/Assets.xcassets/chevronDownLarge.imageset/chevronDownLarge.pdf
 create mode 100644 SampleBrowser/SampleBrowser/Assets.xcassets/chevronUpLarge.imageset/Contents.json
 create mode 100644 SampleBrowser/SampleBrowser/Assets.xcassets/chevronUpLarge.imageset/chevronUpLarge.pdf
 create mode 100644 SampleBrowser/SampleBrowser/Assets.xcassets/crossMedium.imageset/Contents.json
 create mode 100644 SampleBrowser/SampleBrowser/Assets.xcassets/crossMedium.imageset/crossMedium.pdf
 create mode 100644 SampleBrowser/SampleBrowser/Engine/Scripts/AllFramesAtDocumentEnd.js
 create mode 100644 SampleBrowser/SampleBrowser/Engine/Scripts/AllFramesAtDocumentStart.js
 create mode 100644 SampleBrowser/SampleBrowser/Engine/Scripts/MainFrameAtDocumentEnd.js
 create mode 100644 SampleBrowser/SampleBrowser/Engine/Scripts/MainFrameAtDocumentStart.js
 create mode 100644 SampleBrowser/SampleBrowser/Engine/Scripts/WebcompatAllFramesAtDocumentStart.js
 create mode 100644 SampleBrowser/SampleBrowser/UI/Components/FindInPage.swift

diff --git a/BrowserKit/Sources/WebEngine/EngineSession.swift b/BrowserKit/Sources/WebEngine/EngineSession.swift
index f25eba4fe589..f5be2b45bbc0 100644
--- a/BrowserKit/Sources/WebEngine/EngineSession.swift
+++ b/BrowserKit/Sources/WebEngine/EngineSession.swift
@@ -7,6 +7,7 @@ import Foundation
 /// Protocol representing a single engine session. In browsers usually a session corresponds to a tab.
 public protocol EngineSession {
     var delegate: EngineSessionDelegate? { get set }
+    var findInPageDelegate: FindInPageHelperDelegate? { get set }
 
     /// The engine received a request to load a URL.
     /// - Parameter url: The URL string that is requested
@@ -24,9 +25,18 @@ public protocol EngineSession {
     /// Navigates forward in the history of this session.
     func goForward()
 
-    /// Scroll the session to the top
+    /// Scroll the session to the top.
     func scrollToTop()
 
+    /// Find a text selection in this session.
+    /// - Parameters:
+    ///   - text: The text to search
+    ///   - function: The functionality the find in page should search with
+    func findInPage(text: String, function: FindInPageFunction)
+
+    /// Called whenever the find in page session should be ended.
+    func findInPageDone()
+
     /// Navigates to the specified index in the history of this session. The current index of
     /// this session's history  will be updated but the items within it will be unchanged.
     /// Invalid index values are ignored.
diff --git a/BrowserKit/Sources/WebEngine/WKWebview/Scripts/FindInPageContentScript.swift b/BrowserKit/Sources/WebEngine/WKWebview/Scripts/FindInPageContentScript.swift
index ca7c4a7abc50..a15bddf9f1f1 100644
--- a/BrowserKit/Sources/WebEngine/WKWebview/Scripts/FindInPageContentScript.swift
+++ b/BrowserKit/Sources/WebEngine/WKWebview/Scripts/FindInPageContentScript.swift
@@ -6,9 +6,20 @@ import Common
 import Foundation
 import WebKit
 
-protocol FindInPageHelperDelegate: AnyObject {
-    func findInPageHelper(_ findInPageContentScript: FindInPageContentScript, didUpdateCurrentResult currentResult: Int)
-    func findInPageHelper(_ findInPageContentScript: FindInPageContentScript, didUpdateTotalResults totalResults: Int)
+public enum FindInPageFunction: String {
+    /// Find all the occurences of this text in the page
+    case find
+
+    /// Find the next occurence of this text in the page
+    case findNext
+
+    /// Find the previous occurence of this text in the page
+    case findPrevious
+}
+
+public protocol FindInPageHelperDelegate: AnyObject {
+    func findInPageHelper(didUpdateCurrentResult currentResult: Int)
+    func findInPageHelper(didUpdateTotalResults totalResults: Int)
 }
 
 class FindInPageContentScript: WKContentScript {
@@ -31,21 +42,20 @@ class FindInPageContentScript: WKContentScript {
         _ userContentController: WKUserContentController,
         didReceiveScriptMessage message: WKScriptMessage
     ) {
-        guard let parameters = message.body as? [String: String],
-              let token = parameters["appIdToken"],
-              token == DefaultUserScriptManager.appIdToken else {
+        guard let parameters = message.body as? [String: Int] else {
+            // TODO: FXIOS-6463 - Integrate message handler check
             logger.log("FindInPage.js sent wrong type of message",
                        level: .warning,
                        category: .webview)
             return
         }
 
-        if let currentResult = parameters["currentResult"], let result = Int(currentResult) {
-            delegate?.findInPageHelper(self, didUpdateCurrentResult: result)
+        if let currentResult = parameters["currentResult"] {
+            delegate?.findInPageHelper(didUpdateCurrentResult: currentResult)
         }
 
-        if let totalResults = parameters["totalResults"], let result = Int(totalResults) {
-            delegate?.findInPageHelper(self, didUpdateTotalResults: result)
+        if let totalResults = parameters["totalResults"] {
+            delegate?.findInPageHelper(didUpdateTotalResults: totalResults)
         }
     }
 }
diff --git a/BrowserKit/Sources/WebEngine/WKWebview/Scripts/WKContentScriptManager.swift b/BrowserKit/Sources/WebEngine/WKWebview/Scripts/WKContentScriptManager.swift
index be2dcf3199b2..a3b02734758f 100644
--- a/BrowserKit/Sources/WebEngine/WKWebview/Scripts/WKContentScriptManager.swift
+++ b/BrowserKit/Sources/WebEngine/WKWebview/Scripts/WKContentScriptManager.swift
@@ -7,6 +7,8 @@ import WebKit
 
 /// Manager used to add and remove scripts inside a WKEngineSession
 protocol WKContentScriptManager: WKScriptMessageHandler {
+    var scripts: [String: WKContentScript] { get }
+
     func addContentScript(_ script: WKContentScript,
                           name: String,
                           forSession session: WKEngineSession)
@@ -19,12 +21,12 @@ protocol WKContentScriptManager: WKScriptMessageHandler {
 }
 
 class DefaultContentScriptManager: NSObject, WKContentScriptManager {
-    var scripts = [String: WKContentScript]()
+    private(set) var scripts = [String: WKContentScript]()
 
     func addContentScript(_ script: WKContentScript,
                           name: String,
                           forSession session: WKEngineSession) {
-        // If a script already exists on a tab, skip adding this duplicate.
+        // If a script already exists on a session, skip adding this duplicate.
         guard scripts[name] == nil else { return }
 
         scripts[name] = script
diff --git a/BrowserKit/Sources/WebEngine/WKWebview/WKEngineSession.swift b/BrowserKit/Sources/WebEngine/WKWebview/WKEngineSession.swift
index ca48ca664815..49b7a4cfd212 100644
--- a/BrowserKit/Sources/WebEngine/WKWebview/WKEngineSession.swift
+++ b/BrowserKit/Sources/WebEngine/WKWebview/WKEngineSession.swift
@@ -12,6 +12,13 @@ class WKEngineSession: NSObject,
                         WKNavigationDelegate,
                         WKEngineWebViewDelegate {
     weak var delegate: EngineSessionDelegate?
+    weak var findInPageDelegate: FindInPageHelperDelegate? {
+        didSet {
+            guard let findInPage = contentScriptManager.scripts[FindInPageContentScript.name()] as? FindInPageContentScript else { return }
+            findInPage.delegate = findInPageDelegate
+        }
+    }
+
     private(set) var webView: WKEngineWebView
     private var logger: Logger
     var sessionData: WKEngineSessionData
@@ -117,6 +124,15 @@ class WKEngineSession: NSObject,
         webView.engineScrollView.setContentOffset(CGPoint.zero, animated: true)
     }
 
+    func findInPage(text: String, function: FindInPageFunction) {
+        let escaped = text.replacingOccurrences(of: "\\", with: "\\\\").replacingOccurrences(of: "\"", with: "\\\"")
+        webView.evaluateJavascriptInDefaultContentWorld("__firefox__.\(function.rawValue)(\"\(escaped)\")")
+    }
+
+    func findInPageDone() {
+        webView.evaluateJavascriptInDefaultContentWorld("__firefox__.findDone()")
+    }
+
     func goToHistory(index: Int) {
         // TODO: FXIOS-7907 #17651 Handle goToHistoryIndex in WKEngineSession (equivalent to goToBackForwardListItem)
     }
diff --git a/SampleBrowser/SampleBrowser.xcodeproj/project.pbxproj b/SampleBrowser/SampleBrowser.xcodeproj/project.pbxproj
index 6ed157d23f0c..de37815dbf61 100644
--- a/SampleBrowser/SampleBrowser.xcodeproj/project.pbxproj
+++ b/SampleBrowser/SampleBrowser.xcodeproj/project.pbxproj
@@ -37,6 +37,12 @@
 		8A46021E2B0FE50D00FFD17F /* UIView+Extension.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8A46021D2B0FE50D00FFD17F /* UIView+Extension.swift */; };
 		8A4602202B0FE52F00FFD17F /* UISearchbar+Extension.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8A46021F2B0FE52F00FFD17F /* UISearchbar+Extension.swift */; };
 		8A4602222B0FE55300FFD17F /* UIViewController+Extension.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8A4602212B0FE55300FFD17F /* UIViewController+Extension.swift */; };
+		8ADF72C62B73DB9700530E7A /* MainFrameAtDocumentStart.js in Resources */ = {isa = PBXBuildFile; fileRef = 8ADF72C12B73DB9700530E7A /* MainFrameAtDocumentStart.js */; };
+		8ADF72C72B73DB9700530E7A /* AllFramesAtDocumentStart.js in Resources */ = {isa = PBXBuildFile; fileRef = 8ADF72C22B73DB9700530E7A /* AllFramesAtDocumentStart.js */; };
+		8ADF72C82B73DB9700530E7A /* WebcompatAllFramesAtDocumentStart.js in Resources */ = {isa = PBXBuildFile; fileRef = 8ADF72C32B73DB9700530E7A /* WebcompatAllFramesAtDocumentStart.js */; };
+		8ADF72C92B73DB9700530E7A /* AllFramesAtDocumentEnd.js in Resources */ = {isa = PBXBuildFile; fileRef = 8ADF72C42B73DB9700530E7A /* AllFramesAtDocumentEnd.js */; };
+		8ADF72CA2B73DB9700530E7A /* MainFrameAtDocumentEnd.js in Resources */ = {isa = PBXBuildFile; fileRef = 8ADF72C52B73DB9700530E7A /* MainFrameAtDocumentEnd.js */; };
+		8ADF72CD2B73DE6A00530E7A /* FindInPage.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8ADF72CC2B73DE6A00530E7A /* FindInPage.swift */; };
 		8AEBDD712B69A8C300FE9192 /* AppLaunchUtil.swift in Sources */ = {isa = PBXBuildFile; fileRef = 8AEBDD702B69A8C300FE9192 /* AppLaunchUtil.swift */; };
 /* End PBXBuildFile section */
 
@@ -73,6 +79,12 @@
 		8A46021D2B0FE50D00FFD17F /* UIView+Extension.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UIView+Extension.swift"; sourceTree = "<group>"; };
 		8A46021F2B0FE52F00FFD17F /* UISearchbar+Extension.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UISearchbar+Extension.swift"; sourceTree = "<group>"; };
 		8A4602212B0FE55300FFD17F /* UIViewController+Extension.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UIViewController+Extension.swift"; sourceTree = "<group>"; };
+		8ADF72C12B73DB9700530E7A /* MainFrameAtDocumentStart.js */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.javascript; path = MainFrameAtDocumentStart.js; sourceTree = "<group>"; };
+		8ADF72C22B73DB9700530E7A /* AllFramesAtDocumentStart.js */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.javascript; path = AllFramesAtDocumentStart.js; sourceTree = "<group>"; };
+		8ADF72C32B73DB9700530E7A /* WebcompatAllFramesAtDocumentStart.js */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.javascript; path = WebcompatAllFramesAtDocumentStart.js; sourceTree = "<group>"; };
+		8ADF72C42B73DB9700530E7A /* AllFramesAtDocumentEnd.js */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.javascript; path = AllFramesAtDocumentEnd.js; sourceTree = "<group>"; };
+		8ADF72C52B73DB9700530E7A /* MainFrameAtDocumentEnd.js */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.javascript; path = MainFrameAtDocumentEnd.js; sourceTree = "<group>"; };
+		8ADF72CC2B73DE6A00530E7A /* FindInPage.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FindInPage.swift; sourceTree = "<group>"; };
 		8AEBDD702B69A8C300FE9192 /* AppLaunchUtil.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppLaunchUtil.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
@@ -91,6 +103,7 @@
 		8A0F44692B56EDC000438589 /* Engine */ = {
 			isa = PBXGroup;
 			children = (
+				8ADF72C02B73D6F600530E7A /* Scripts */,
 				8A0F446A2B56EDC900438589 /* EngineProvider.swift */,
 			);
 			path = Engine;
@@ -206,6 +219,7 @@
 		8A4602152B0FE42300FFD17F /* Components */ = {
 			isa = PBXGroup;
 			children = (
+				8ADF72CC2B73DE6A00530E7A /* FindInPage.swift */,
 				8A4602162B0FE43A00FFD17F /* BrowserSearchBar.swift */,
 				8A4602182B0FE45200FFD17F /* BrowserToolbar.swift */,
 			);
@@ -231,6 +245,18 @@
 			path = Browser;
 			sourceTree = "<group>";
 		};
+		8ADF72C02B73D6F600530E7A /* Scripts */ = {
+			isa = PBXGroup;
+			children = (
+				8ADF72C42B73DB9700530E7A /* AllFramesAtDocumentEnd.js */,
+				8ADF72C22B73DB9700530E7A /* AllFramesAtDocumentStart.js */,
+				8ADF72C52B73DB9700530E7A /* MainFrameAtDocumentEnd.js */,
+				8ADF72C12B73DB9700530E7A /* MainFrameAtDocumentStart.js */,
+				8ADF72C32B73DB9700530E7A /* WebcompatAllFramesAtDocumentStart.js */,
+			);
+			path = Scripts;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
@@ -292,8 +318,13 @@
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				8ADF72C92B73DB9700530E7A /* AllFramesAtDocumentEnd.js in Resources */,
+				8ADF72C82B73DB9700530E7A /* WebcompatAllFramesAtDocumentStart.js in Resources */,
 				8A4601F12B0FE20700FFD17F /* LaunchScreen.storyboard in Resources */,
 				8A4601EE2B0FE20700FFD17F /* Assets.xcassets in Resources */,
+				8ADF72C62B73DB9700530E7A /* MainFrameAtDocumentStart.js in Resources */,
+				8ADF72C72B73DB9700530E7A /* AllFramesAtDocumentStart.js in Resources */,
+				8ADF72CA2B73DB9700530E7A /* MainFrameAtDocumentEnd.js in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -321,6 +352,7 @@
 				8A0F44852B56FFFC00438589 /* SearchTerm.swift in Sources */,
 				8A3DB32F2B5AD3D400F89705 /* SettingsCell.swift in Sources */,
 				8A0F44792B56FD6E00438589 /* SuggestionCellViewModel.swift in Sources */,
+				8ADF72CD2B73DE6A00530E7A /* FindInPage.swift in Sources */,
 				8A3DB32D2B5AD3C700F89705 /* SettingsViewController.swift in Sources */,
 				8A4602192B0FE45200FFD17F /* BrowserToolbar.swift in Sources */,
 				8AEBDD712B69A8C300FE9192 /* AppLaunchUtil.swift in Sources */,
diff --git a/SampleBrowser/SampleBrowser/Assets.xcassets/chevronDownLarge.imageset/Contents.json b/SampleBrowser/SampleBrowser/Assets.xcassets/chevronDownLarge.imageset/Contents.json
new file mode 100644
index 000000000000..4e1aac97fc56
--- /dev/null
+++ b/SampleBrowser/SampleBrowser/Assets.xcassets/chevronDownLarge.imageset/Contents.json
@@ -0,0 +1,12 @@
+{
+  "images" : [
+    {
+      "filename" : "chevronDownLarge.pdf",
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}
diff --git a/SampleBrowser/SampleBrowser/Assets.xcassets/chevronDownLarge.imageset/chevronDownLarge.pdf b/SampleBrowser/SampleBrowser/Assets.xcassets/chevronDownLarge.imageset/chevronDownLarge.pdf
new file mode 100644
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GIT binary patch
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diff --git a/SampleBrowser/SampleBrowser/Assets.xcassets/chevronUpLarge.imageset/Contents.json b/SampleBrowser/SampleBrowser/Assets.xcassets/chevronUpLarge.imageset/Contents.json
new file mode 100644
index 000000000000..fc3e4b9e2501
--- /dev/null
+++ b/SampleBrowser/SampleBrowser/Assets.xcassets/chevronUpLarge.imageset/Contents.json
@@ -0,0 +1,12 @@
+{
+  "images" : [
+    {
+      "filename" : "chevronUpLarge.pdf",
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}
diff --git a/SampleBrowser/SampleBrowser/Assets.xcassets/chevronUpLarge.imageset/chevronUpLarge.pdf b/SampleBrowser/SampleBrowser/Assets.xcassets/chevronUpLarge.imageset/chevronUpLarge.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..237fc56b88e9149ea7af6dd6cf61f0b2b6d19b19
GIT binary patch
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diff --git a/SampleBrowser/SampleBrowser/Assets.xcassets/crossMedium.imageset/Contents.json b/SampleBrowser/SampleBrowser/Assets.xcassets/crossMedium.imageset/Contents.json
new file mode 100644
index 000000000000..3fc07befde46
--- /dev/null
+++ b/SampleBrowser/SampleBrowser/Assets.xcassets/crossMedium.imageset/Contents.json
@@ -0,0 +1,12 @@
+{
+  "images" : [
+    {
+      "filename" : "crossMedium.pdf",
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}
diff --git a/SampleBrowser/SampleBrowser/Assets.xcassets/crossMedium.imageset/crossMedium.pdf b/SampleBrowser/SampleBrowser/Assets.xcassets/crossMedium.imageset/crossMedium.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..a5b98bb59ea4c3348c4bc151746b7eb07546788c
GIT binary patch
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literal 0
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diff --git a/SampleBrowser/SampleBrowser/Engine/Scripts/AllFramesAtDocumentEnd.js b/SampleBrowser/SampleBrowser/Engine/Scripts/AllFramesAtDocumentEnd.js
new file mode 100644
index 000000000000..513e399ba4ab
--- /dev/null
+++ b/SampleBrowser/SampleBrowser/Engine/Scripts/AllFramesAtDocumentEnd.js
@@ -0,0 +1 @@
+(()=>{"use strict";window.__firefox__||Object.defineProperty(window,"__firefox__",{enumerable:!1,configurable:!1,writable:!1,value:{userScripts:{},includeOnce:function(e,t){return!!__firefox__.userScripts[e]||(__firefox__.userScripts[e]=!0,"function"==typeof t&&t(),!1)}}})})(),(()=>{function e(){let e={url:document.location.href,urls:t(),cookies:n()};webkit.messageHandlers.adsMessageHandler.postMessage(e)}function t(){let e=[],t=document.getElementsByTagName("a");for(let n of t)n.href&&e.push(n.href);return e}function n(){let e=document.cookie.split("; "),t=[];return e.forEach((e=>{var[n,...o]=e.split("=");o=o.join("="),t.push({name:n,value:o})})),t}const o=t=>{switch(t.type){case"load":e();break;case"pageshow":t.persisted&&e();break;default:console.log("Event:",t.type)}};["pageshow","load"].forEach((e=>window.addEventListener(e,o)))})(),(()=>{"use strict";window.__firefox__.includeOnce("ContextMenu",(function(){window.addEventListener("touchstart",(function(e){var t=e.target,n=t.closest("a"),o=t.closest("img");if(n||o){var s={};s.touchX=e.changedTouches[0].pageX-window.scrollX,s.touchY=e.changedTouches[0].pageY-window.scrollY,n&&(s.link=n.href,s.title=n.textContent),o&&(s.image=o.src,s.title=s.title||o.title,s.alt=o.alt),(s.link||s.image)&&webkit.messageHandlers.contextMenuMessageHandler.postMessage(s)}}),!0)}))})(),(()=>{"use strict";window.__firefox__.includeOnce("FocusHelper",(function(){const e=e=>{const t=e.type,n=e.target.nodeName;("INPUT"===n||"TEXTAREA"===n||e.target.isContentEditable)&&((e=>{if("INPUT"!==e.nodeName)return!1;const t=e.type.toUpperCase();return"BUTTON"==t||"SUBMIT"==t||"FILE"==t})(e.target)||webkit.messageHandlers.focusHelper.postMessage({eventType:t,elementType:n}))},t={capture:!0,passive:!0},n=window.document.body;["focus","blur"].forEach((o=>{n.addEventListener(o,e,t)}))}))})(),(()=>{"use strict";window.__firefox__.includeOnce("PrintHandler",(function(){window.print=function(){webkit.messageHandlers.printHandler.postMessage({})}}))})();
\ No newline at end of file
diff --git a/SampleBrowser/SampleBrowser/Engine/Scripts/AllFramesAtDocumentStart.js b/SampleBrowser/SampleBrowser/Engine/Scripts/AllFramesAtDocumentStart.js
new file mode 100644
index 000000000000..69d3f26801c5
--- /dev/null
+++ b/SampleBrowser/SampleBrowser/Engine/Scripts/AllFramesAtDocumentStart.js
@@ -0,0 +1 @@
+(()=>{"use strict";var e={919:()=>{webkit.messageHandlers.trackingProtectionStats&&function(){let e=!0;Object.defineProperty(window.__firefox__,"TrackingProtectionStats",{enumerable:!1,configurable:!1,writable:!1,value:{}}),Object.defineProperty(window.__firefox__.TrackingProtectionStats,"setEnabled",{enumerable:!1,configurable:!1,writable:!1,value:function(t,n){n===APP_ID_TOKEN&&t!==e&&(e=t,c(t))}});let t=new Array,n=null;function r(r){if(e){try{if(document.location.host===new URL(r).host)return}catch(e){}r&&t.push(r),n||(n=setTimeout((()=>{n=null,t.length<1||(webkit.messageHandlers.trackingProtectionStats.postMessage({urls:t}),t=new Array)}),200))}}function i(){[].slice.apply(document.scripts).forEach((function(e){r(e.src)})),[].slice.apply(document.images).forEach((function(e){r(e.src)})),[].slice.apply(document.getElementsByTagName("iframe")).forEach((function(e){r(e.src)}))}let o=null,s=null,a=null,l=null,u=null;function c(e){if(!e)return window.removeEventListener("load",i,!1),void(o&&(XMLHttpRequest.prototype.open=o,XMLHttpRequest.prototype.send=s,window.fetch=a,u.disconnect(),o=s=l=u=null));if(!o){window.addEventListener("load",i,!1),o||(o=XMLHttpRequest.prototype.open,s=XMLHttpRequest.prototype.send);var t=new WeakMap;new WeakMap,XMLHttpRequest.prototype.open=function(e,n){return t.set(this,n),o.apply(this,arguments)},XMLHttpRequest.prototype.send=function(e){return r(t.get(this)),s.apply(this,arguments)},a||(a=window.fetch),window.fetch=function(e,t){return"string"==typeof e?r(e):e instanceof Request&&r(e.url),a.apply(window,arguments)},l||(l=Object.getOwnPropertyDescriptor(Image.prototype,"src")),delete Image.prototype.src,Object.defineProperty(Image.prototype,"src",{get:function(){return l.get.call(this)},set:function(e){r(this.src),l.set.call(this,e)}}),u=new MutationObserver((function(e){e.forEach((function(e){e.addedNodes.forEach((function(e){if("SCRIPT"===e.tagName&&e.src)r(e.src);else if("IMG"===e.tagName&&e.src)r(e.src);else if("IFRAME"===e.tagName&&e.src){if("about:blank"===e.src)return;r(e.src)}else"LINK"===e.tagName&&e.href&&r(e.href)}))}))})),u.observe(document.documentElement,{childList:!0,subtree:!0})}}c(!0)}()}},t={};window.__firefox__||Object.defineProperty(window,"__firefox__",{enumerable:!1,configurable:!1,writable:!1,value:{userScripts:{},includeOnce:function(e,t){return!!__firefox__.userScripts[e]||(__firefox__.userScripts[e]=!0,"function"==typeof t&&t(),!1)}}}),void 0===window.__firefox__.download&&Object.defineProperty(window.__firefox__,"download",{enumerable:!1,configurable:!1,writable:!1,value:function(e,t){if(t===APP_ID_TOKEN){if(e.startsWith("blob:")){var n=new XMLHttpRequest;return n.open("GET",e,!0),n.responseType="blob",n.onload=function(){if(200===this.status){var t=this.response;!function(e,t){var n=new FileReader;n.onloadend=function(){t(this.result.split(",")[1])},n.readAsDataURL(e)}(t,(function(n){webkit.messageHandlers.downloadManager.postMessage({url:e,mimeType:t.type,size:t.size,base64String:n})}))}},void n.send()}var r=document.createElement("a");r.href=e,r.dispatchEvent(new MouseEvent("click"))}}}),window.__firefox__.includeOnce("LoginsHelper",(function(){function e(e){}var t={_getRandomId:function(){return Math.round(Math.random()*(Number.MAX_VALUE-Number.MIN_VALUE)+Number.MIN_VALUE).toString()},_messages:["RemoteLogins:loginsFound"],_requests:{},_takeRequest:function(e){var t=e,n=this._requests[t.requestId];return this._requests[t.requestId]=void 0,n},_sendRequest:function(e,t){var n=this._getRandomId();t.requestId=n,webkit.messageHandlers.loginsManagerMessageHandler.postMessage(t);var r=this;return new Promise((function(t,i){e.promise={resolve:t,reject:i},r._requests[n]=e}))},receiveMessage:function(e){var t=this._takeRequest(e);switch(e.name){case"RemoteLogins:loginsFound":t.promise.resolve({form:t.form,loginsFound:e.logins});break;case"RemoteLogins:loginsAutoCompleted":t.promise.resolve(e.logins)}},_asyncFindLogins:function(e,t){var i=this._getFormFields(e,!1);if(!i[0]||!i[1])return Promise.reject("No logins found");i[0].addEventListener("blur",r);var o=n._getPasswordOrigin(e.ownerDocument.documentURI),s=n._getActionOrigin(e);if(null==s)return Promise.reject("Action origin is null");var a={form:e},l={type:"request",formOrigin:o,actionOrigin:s};return this._sendRequest(a,l)},loginsFound:function(e,t){this._fillForm(e,!0,!1,!1,!1,t)},onUsernameInput:function(t){var n=t.target;if(n.ownerDocument instanceof HTMLDocument&&this._isUsernameFieldType(n)){var r=n.form;if(r&&n.value){t.type;var[i,o,s]=this._getFormFields(r,!1);if(i==n&&o){var a=this;this._asyncFindLogins(r,{showMasterPassword:!1}).then((function(e){a._fillForm(e.form,!0,!0,!0,!0,e.loginsFound)})).then(null,e)}}}},_getPasswordFields:function(e,t){for(var n=[],r=0;r<e.elements.length;r++){var i=e.elements[r];i instanceof HTMLInputElement&&"password"==i.type&&(t&&!i.value||(n[n.length]={index:r,element:i}))}return 0==n.length?null:n.length>3?(n.length,null):n},_isUsernameFieldType:function(e){return e instanceof HTMLInputElement&&!!class{static inputTypeIsCompatibleWithUsername(e){const t=e.getAttribute("type")?.toLowerCase()||e.type;return["text","email","url","tel","number","search"].includes(t)||t?.includes("user")}static elementAttrsMatchRegex(e,t){if(t.test(e.id)||t.test(e.name)||t.test(e.className))return!0;const n=e.getAttribute("placeholder");return n&&t.test(n)}static hasLabelMatchingRegex(e,t){return t.test(e.labels?.[0]?.textContent)}}.inputTypeIsCompatibleWithUsername(e)},_getFormFields:function(e,t){var n,r,i=null,o=this._getPasswordFields(e,t);if(!o)return[null,null,null];for(var s=o[0].index-1;s>=0;s--){var a=e.elements[s];if(this._isUsernameFieldType(a)){i=a;break}}if(!t||1==o.length)return[i,o[0].element,null];var l=o[0].element.value,u=o[1].element.value,c=o[2]?o[2].element.value:null;if(3==o.length)if(l==u&&u==c)r=o[0].element,n=null;else if(l==u)r=o[0].element,n=o[2].element;else if(u==c)n=o[0].element,r=o[2].element;else{if(l!=c)return[null,null,null];r=o[0].element,n=o[1].element}else l==u?(r=o[0].element,n=null):(n=o[0].element,r=o[1].element);return[i,r,n]},_isAutocompleteDisabled:function(e){return!(!e||!e.hasAttribute("autocomplete")||"off"!=e.getAttribute("autocomplete").toLowerCase())},_onFormSubmit:function(e){var t=e.ownerDocument,r=t.defaultView,i=n._getPasswordOrigin(t.documentURI);if(i){var o=n._getActionOrigin(e),s=this._getFormFields(e,!0),a=s[0],l=s[1],u=s[2];if(null!=l){this._isAutocompleteDisabled(e)||this._isAutocompleteDisabled(a)||this._isAutocompleteDisabled(l)||this._isAutocompleteDisabled(u);var c=a?{name:a.name,value:a.value}:null,d={name:l.name,value:l.value};u&&(u.name,u.value),r.opener&&r.opener.top,webkit.messageHandlers.loginsManagerMessageHandler.postMessage({type:"submit",hostname:i,username:c.value,usernameField:c.name,password:d.value,passwordField:d.name,formSubmitUrl:o})}}},_fillForm:function(e,t,n,r,i,o){var s=this._getFormFields(e,!1),l=s[0],u=s[1];if(null==u)return[!1,o];if(u.disabled||u.readOnly)return[!1,o];var c=Number.MAX_VALUE,d=Number.MAX_VALUE;l&&l.maxLength>=0&&(c=l.maxLength),u.maxLength>=0&&(d=u.maxLength),o=function(e,t){var n,r,i;if(null==e)throw new TypeError("Array is null or not defined");var o=Object(e),s=o.length>>>0;if("function"!=typeof t)throw new TypeError(t+" is not a function");for(arguments.length>1&&(n=e),r=new Array(s),i=0;i<s;){var a,l;i in o&&(a=o[i],l=t.call(n,a,i,o),r[i]=l),i++}return r}(o,(function(e){return{hostname:e.hostname,formSubmitUrl:e.formSubmitUrl,httpRealm:e.httpRealm,username:e.username,password:e.password,usernameField:e.usernameField,passwordField:e.passwordField}}));var f=o.filter((function(e){var t=e.username.length<=c&&e.password.length<=d;return t||e.username,t}),this);if(0==f.length)return[!1,o];if(u.value&&!r)return[!1,o];var m=!1;!n&&(this._isAutocompleteDisabled(e)||this._isAutocompleteDisabled(l)||this._isAutocompleteDisabled(u))&&(m=!0);var p=null;if(l&&(l.value||l.disabled||l.readOnly)){var g=l.value.toLowerCase(),h=f.filter((function(e){return e.username.toLowerCase()==g}));if(h.length){for(var v=0;v<h.length;v++){var w=h[v];w.username==l.value&&(p=w)}p||(p=h[0])}}else 1==f.length?p=f[0]:(h=l?f.filter((function(e){return e.username})):f.filter((function(e){return!e.username})),p=h[0]);var _=!1;if(p&&t&&!m){if(l){var b=l.disabled||l.readOnly,y=p.username!=l.value,L=i&&y&&l.value.toLowerCase()==p.username.toLowerCase();b||L||!y||(l.value=p.username,a(l,"keydown",40),a(l,"keyup",40),document.activeElement!==l&&l.dispatchEvent(new Event("change")))}u.value!=p.password&&(u.value=p.password,a(u,"keydown",40),a(u,"keyup",40),document.activeElement!==u&&u.dispatchEvent(new Event("change"))),_=!0}return[_,o]}},n={_getPasswordOrigin:function(e,t){return e},_getActionOrigin:function(e){var t=e.action;return""==t&&(t=e.baseURI),this._getPasswordOrigin(t,!0)}};function r(e){t.onUsernameInput(e)}var i=new MutationObserver((function(e){for(var t=0;t<e.length;++t)o(e[t].addedNodes)}));function o(e){for(var t=0;t<e.length;t++){var n=e[t];"FORM"===n.nodeName?s(n):n.hasChildNodes()&&o(n.childNodes)}return!1}function s(n){try{t._asyncFindLogins(n,{}).then((function(e){t.loginsFound(e.form,e.loginsFound)})).then(null,e)}catch(e){}}function a(e,t,n){var r=document.createEvent("KeyboardEvent");r.initKeyboardEvent(t,!0,!0,window,0,0,0,0,0,n),e.dispatchEvent(r)}window.addEventListener("load",(function(e){i.observe(document.body,{attributes:!1,childList:!0,characterData:!1,subtree:!0});for(var t=0;t<document.forms.length;t++)s(document.forms[t])})),window.addEventListener("submit",(function(e){try{t._onFormSubmit(e.target)}catch(e){}})),Object.defineProperty(window.__firefox__,"logins",{enumerable:!1,configurable:!1,writable:!1,value:Object.freeze(new function(){this.inject=function(e){try{t.receiveMessage(e)}catch(e){}}})})})),function n(r){var i=t[r];if(void 0!==i)return i.exports;var o=t[r]={exports:{}};return e[r](o,o.exports,n),o.exports}(919)})();
\ No newline at end of file
diff --git a/SampleBrowser/SampleBrowser/Engine/Scripts/MainFrameAtDocumentEnd.js b/SampleBrowser/SampleBrowser/Engine/Scripts/MainFrameAtDocumentEnd.js
new file mode 100644
index 000000000000..05666efca750
--- /dev/null
+++ b/SampleBrowser/SampleBrowser/Engine/Scripts/MainFrameAtDocumentEnd.js
@@ -0,0 +1 @@
+(()=>{var e={327:(e,t,n)=>{const{makeUrlAbsolute:r,parseUrl:o}=n(898);function i(e){return e.replace(/www[a-zA-Z0-9]*\./,"").replace(".co.",".").split(".").slice(0,-1).join(" ")}function l(e){return(t,n)=>{let r,o=0;for(let n=0;n<e.rules.length;n++){const[i,l]=e.rules[n],a=Array.from(t.querySelectorAll(i));if(a.length)for(const t of a){let i=e.rules.length-n;if(e.scorers)for(const n of e.scorers){const e=n(t,i);e&&(i=e)}i>o&&(o=i,r=l(t))}}if(!r&&e.defaultValue&&(r=e.defaultValue(n)),r){if(e.processors)for(const t of e.processors)r=t(r,n);return r.trim&&(r=r.trim()),r}}}const a={description:{rules:[['meta[property="og:description"]',e=>e.getAttribute("content")],['meta[name="description" i]',e=>e.getAttribute("content")]]},icon:{rules:[['link[rel="apple-touch-icon"]',e=>e.getAttribute("href")],['link[rel="apple-touch-icon-precomposed"]',e=>e.getAttribute("href")],['link[rel="icon" i]',e=>e.getAttribute("href")],['link[rel="fluid-icon"]',e=>e.getAttribute("href")],['link[rel="shortcut icon"]',e=>e.getAttribute("href")],['link[rel="Shortcut Icon"]',e=>e.getAttribute("href")],['link[rel="mask-icon"]',e=>e.getAttribute("href")]],scorers:[(e,t)=>{const n=e.getAttribute("sizes");if(n){const e=n.match(/\d+/g);if(e)return e[0]}}],defaultValue:e=>"favicon.ico",processors:[(e,t)=>r(t.url,e)]},image:{rules:[['meta[property="og:image:secure_url"]',e=>e.getAttribute("content")],['meta[property="og:image:url"]',e=>e.getAttribute("content")],['meta[property="og:image"]',e=>e.getAttribute("content")],['meta[name="twitter:image"]',e=>e.getAttribute("content")],['meta[property="twitter:image"]',e=>e.getAttribute("content")],['meta[name="thumbnail"]',e=>e.getAttribute("content")]],processors:[(e,t)=>r(t.url,e)]},keywords:{rules:[['meta[name="keywords" i]',e=>e.getAttribute("content")]],processors:[(e,t)=>e.split(",").map((e=>e.trim()))]},title:{rules:[['meta[property="og:title"]',e=>e.getAttribute("content")],['meta[name="twitter:title"]',e=>e.getAttribute("content")],['meta[property="twitter:title"]',e=>e.getAttribute("content")],['meta[name="hdl"]',e=>e.getAttribute("content")],["title",e=>e.text]]},language:{rules:[["html[lang]",e=>e.getAttribute("lang")],['meta[name="language" i]',e=>e.getAttribute("content")]],processors:[(e,t)=>e.split("-")[0]]},type:{rules:[['meta[property="og:type"]',e=>e.getAttribute("content")]]},url:{rules:[["a.amp-canurl",e=>e.getAttribute("href")],['link[rel="canonical"]',e=>e.getAttribute("href")],['meta[property="og:url"]',e=>e.getAttribute("content")]],defaultValue:e=>e.url,processors:[(e,t)=>r(t.url,e)]},provider:{rules:[['meta[property="og:site_name"]',e=>e.getAttribute("content")]],defaultValue:e=>i(o(e.url))}};e.exports={buildRuleSet:l,getMetadata:function(e,t,n){const 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box-shadow: 0 0 0 4px #f19750,0 1px 3px 3px rgba(0,0,0,.75);\n}`;var r="",o=null,i=null,l=-1,a=document.createElement("span");a.className=e;var c=document.createElement("style");function u(){i&&(l=(l+i.length+1)%i.length,f())}function s(){if(!i)return;let e,t=i;for(let n=0,r=t.length;n<r;n++)e=t[n],d(e);i=null,l=-1}function f(){c.parentNode||document.body.appendChild(c);let n=document.querySelector("."+t);if(n&&(n.className=e),!i)return;let r=i[l];r?(r.className=e+" "+t,function(e,t){let n,r=e.getBoundingClientRect(),o=m(r.left+window.scrollX-window.innerWidth/2,0,document.body.scrollWidth),i=m(40+r.top+window.scrollY-window.innerHeight/2,0,document.body.scrollHeight),l=window.scrollX,a=window.scrollY,c=o-l,u=i-a;requestAnimationFrame((function e(t){n||(n=t);let 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e=n(327);Object.defineProperty(window.__firefox__,"metadata",{enumerable:!1,configurable:!1,writable:!1,value:Object.freeze(new function(){this.getMetadata=function(){let t=e.getMetadata(document,document.URL);if(t.url=document.URL,!location.pathname.startsWith("/amp/"))return t;const n=document.querySelector("link[rel='canonical']");if(!n?.href)return t;try{new URL(n.href,location).protocol.match(/^https?:$/)&&(t.url=n.href)}catch(e){}return t}})})})()})();
\ No newline at end of file
diff --git a/SampleBrowser/SampleBrowser/Engine/Scripts/MainFrameAtDocumentStart.js b/SampleBrowser/SampleBrowser/Engine/Scripts/MainFrameAtDocumentStart.js
new file mode 100644
index 000000000000..19f3822ab334
--- /dev/null
+++ b/SampleBrowser/SampleBrowser/Engine/Scripts/MainFrameAtDocumentStart.js
@@ -0,0 +1,2 @@
+/*! For license information please see MainFrameAtDocumentStart.js.LICENSE.txt */
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i=e.length-1;i>=0;i--){var n=e[i],a=n.parentNode;a&&(t&&!t.call(this,n,i,e)||a.removeChild(n))}},_replaceNodeTags:function(e,t){if(this._docJSDOMParser&&e._isLiveNodeList)throw new Error("Do not pass live node lists to _replaceNodeTags");for(const i of e)this._setNodeTag(i,t)},_forEachNode:function(e,t){Array.prototype.forEach.call(e,t,this)},_findNode:function(e,t){return Array.prototype.find.call(e,t,this)},_someNode:function(e,t){return Array.prototype.some.call(e,t,this)},_everyNode:function(e,t){return Array.prototype.every.call(e,t,this)},_concatNodeLists:function(){var e=Array.prototype.slice,t=e.call(arguments),i=t.map((function(t){return e.call(t)}));return Array.prototype.concat.apply([],i)},_getAllNodesWithTag:function(e,t){return e.querySelectorAll?e.querySelectorAll(t.join(",")):[].concat.apply([],t.map((function(t){var i=e.getElementsByTagName(t);return Array.isArray(i)?i:Array.from(i)})))},_cleanClasses:function(e){var 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r(e){e.style.webkitFilter=e.__firefox__NightMode_originalFilter,delete e.__firefox__NightMode_originalFilter}var o=null,s=new MutationObserver((function(e){e.forEach((function(e){e.addedNodes.forEach((function(e){e.nodeType===Node.ELEMENT_NODE&&a(e)}))}))}));Object.defineProperty(window.__firefox__.NightMode,"setEnabled",{enumerable:!1,configurable:!1,writable:!1,value:function(e){if(e!==window.__firefox__.NightMode.enabled){window.__firefox__.NightMode.enabled=e;var t=n();if(e)return o=[],document.documentElement.appendChild(t),a(document),void s.observe(document.documentElement,{childList:!0,subtree:!0});s.disconnect(),o.forEach(r);var i=t.parentNode;i&&i.removeChild(t),o=null,"rgba(0, 0, 0, 0)"===getComputedStyle(document.documentElement)["background-color"]&&(document.documentElement.style.backgroundColor="#fff")}}}),window.addEventListener("DOMContentLoaded",(function(){window.__firefox__.NightMode.setEnabled(window.__firefox__.NightMode.enabled)}))})(),(()=>{"use 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webkit.messageHandlers.readerModeMessageHandler.postMessage({Type:"ReaderContentParsed",Value:e});var{Readability:t}=i(107),a={spec:document.location.href,host:document.location.host,prePath:document.location.protocol+"//"+document.location.host,scheme:document.location.protocol.substr(0,document.location.protocol.indexOf(":")),pathBase:document.location.protocol+"//"+document.location.host+location.pathname.substr(0,location.pathname.lastIndexOf("/")+1)},o=(new XMLSerializer).serializeToString(document);if(o.indexOf("<frameset ")>-1)return void webkit.messageHandlers.readerModeMessageHandler.postMessage({Type:"ReaderModeStateChange",Value:"Unavailable"});const n=i(856).sanitize(o,{WHOLE_DOCUMENT:!0});var s=new t(a,(new DOMParser).parseFromString(n,"text/html"),{debug:!1});return(e=s.parse())?(e.title=r(e.title),e.byline=r(e.byline),webkit.messageHandlers.readerModeMessageHandler.postMessage({Type:"ReaderModeStateChange",Value:null!==e?"Available":"Unavailable"}),void webkit.messageHandlers.readerModeMessageHandler.postMessage({Type:"ReaderContentParsed",Value:e})):void webkit.messageHandlers.readerModeMessageHandler.postMessage({Type:"ReaderModeStateChange",Value:"Unavailable"})}webkit.messageHandlers.readerModeMessageHandler.postMessage({Type:"ReaderModeStateChange",Value:"Unavailable"})}}),100)},readerize:function(){return e},setStyle:a})}),window.addEventListener("load",(function(e){document.location.href.match(n)&&(a(JSON.parse(document.body.getAttribute("data-readerStyle"))),function(){var e=document.getElementById("reader-message");e&&(e.style.display="none");var t=document.getElementById("reader-header");t&&(t.style.display="block");var i=document.getElementById("reader-content");i&&(i.style.display="block")}(),function(){var e=document.getElementById("reader-content");if(e)for(var t=window.innerWidth,i=e.offsetWidth,n=t+"px !important",a=function(e){e._originalWidth||(e._originalWidth=e.offsetWidth);var a=e._originalWidth;a<i&&a>.55*t&&(a=t);var r=Math.max((i-t)/2,(i-a)/2)+"px !important",o="max-width: "+n+";width: "+a+"px !important;margin-left: "+r+";margin-right: "+r+";";e.style.cssText=o},r=document.querySelectorAll(".content p > img:only-child, .content p > a:only-child > img:only-child, .content .wp-caption img, .content figure img"),o=r.length;--o>=0;){var s=r[o];s.width>0?a(s):s.onload=function(){a(s)}}}())})),window.addEventListener("pageshow",(function(e){document.location.href.match(n)&&webkit.messageHandlers.readerModeMessageHandler.postMessage({Type:"ReaderPageEvent",Value:"PageShow"})}))})()})();
\ No newline at end of file
diff --git a/SampleBrowser/SampleBrowser/Engine/Scripts/WebcompatAllFramesAtDocumentStart.js b/SampleBrowser/SampleBrowser/Engine/Scripts/WebcompatAllFramesAtDocumentStart.js
new file mode 100644
index 000000000000..34092295e7ff
--- /dev/null
+++ b/SampleBrowser/SampleBrowser/Engine/Scripts/WebcompatAllFramesAtDocumentStart.js
@@ -0,0 +1 @@
+(()=>{var e=!!(document.fullscreenEnabled||document.webkitFullscreenEnabled||document.mozFullScreenEnabled||document.msFullscreenEnabled),t=void 0!==HTMLVideoElement.prototype.webkitEnterFullscreen;e||!t||/mobile/i.test(navigator.userAgent)||(HTMLElement.prototype.requestFullscreen=function(){if(void 0!==this.webkitRequestFullscreen)return this.webkitRequestFullscreen(),!0;if(void 0!==this.webkitEnterFullscreen)return this.webkitEnterFullscreen(),!0;var e=this.querySelector("video");return void 0!==e&&(e.webkitEnterFullscreen(),!0)},Object.defineProperty(document,"fullscreenEnabled",{get:function(){return!0}}),Object.defineProperty(document.documentElement,"fullscreenEnabled",{get:function(){return!0}}))})();
\ No newline at end of file
diff --git a/SampleBrowser/SampleBrowser/UI/Browser/BrowserViewController.swift b/SampleBrowser/SampleBrowser/UI/Browser/BrowserViewController.swift
index 2a3a24a07c1d..ab9a640a744c 100644
--- a/SampleBrowser/SampleBrowser/UI/Browser/BrowserViewController.swift
+++ b/SampleBrowser/SampleBrowser/UI/Browser/BrowserViewController.swift
@@ -9,10 +9,16 @@ protocol NavigationDelegate: AnyObject {
     func onURLChange(url: String)
     func onLoadingStateChange(loading: Bool)
     func onNavigationStateChange(canGoBack: Bool, canGoForward: Bool)
+
+    func onFindInPage(selected: String)
+    func onFindInPage(currentResult: Int)
+    func onFindInPage(totalResults: Int)
 }
 
 // Holds different type of browser views, communicating through protocols with them
-class BrowserViewController: UIViewController, EngineSessionDelegate {
+class BrowserViewController: UIViewController,
+                                EngineSessionDelegate,
+                             FindInPageHelperDelegate {
     weak var navigationDelegate: NavigationDelegate?
     private lazy var progressView: UIProgressView = .build { _ in }
     private var engineSession: EngineSession!
@@ -27,6 +33,8 @@ class BrowserViewController: UIViewController, EngineSessionDelegate {
         self.engineView = engineProvider.view
         self.urlFormatter = urlFormatter
         super.init(nibName: nil, bundle: nil)
+
+        engineSession.findInPageDelegate = self
     }
 
     required init?(coder: NSCoder) {
@@ -98,6 +106,14 @@ class BrowserViewController: UIViewController, EngineSessionDelegate {
         engineSession.scrollToTop()
     }
 
+    func findInPage(text: String, function: FindInPageFunction) {
+        engineSession.findInPage(text: text, function: function)
+    }
+
+    func findInPageDone() {
+        engineSession.findInPageDone()
+    }
+
     // MARK: - Search
 
     func loadUrlOrSearch(_ searchTerm: SearchTerm) {
@@ -145,10 +161,20 @@ class BrowserViewController: UIViewController, EngineSessionDelegate {
     // MARK: - EngineSessionDelegate Menu items
 
     func findInPage(with selection: String) {
-        // FXIOS-8087: Handle find in page in WebEngine
+        navigationDelegate?.onFindInPage(selected: selection)
     }
 
     func search(with selection: String) {
         loadUrlOrSearch(SearchTerm(term: selection))
     }
+
+    // MARK: - FindInPageHelperDelegate
+
+    func findInPageHelper(didUpdateCurrentResult currentResult: Int) {
+        navigationDelegate?.onFindInPage(currentResult: currentResult)
+    }
+
+    func findInPageHelper(didUpdateTotalResults totalResults: Int) {
+        navigationDelegate?.onFindInPage(totalResults: totalResults)
+    }
 }
diff --git a/SampleBrowser/SampleBrowser/UI/Components/FindInPage.swift b/SampleBrowser/SampleBrowser/UI/Components/FindInPage.swift
new file mode 100644
index 000000000000..b0d5287888d7
--- /dev/null
+++ b/SampleBrowser/SampleBrowser/UI/Components/FindInPage.swift
@@ -0,0 +1,191 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/
+
+import Common
+import UIKit
+
+protocol FindInPageBarDelegate: AnyObject {
+    func findInPage(_ findInPage: FindInPageBar, textChanged text: String)
+    func findInPage(_ findInPage: FindInPageBar, findPreviousWithText text: String)
+    func findInPage(_ findInPage: FindInPageBar, findNextWithText text: String)
+    func findInPageDidPressClose(_ findInPage: FindInPageBar)
+}
+
+class FindInPageBar: UIView, UITextFieldDelegate, ThemeApplicable {
+    private struct UX {
+        static let fontSize: CGFloat = 16
+        static let totalResultsMax = 500
+    }
+
+    weak var delegate: FindInPageBarDelegate?
+
+    private lazy var topBorder: UIView = .build()
+
+    private lazy var searchText: UITextField = .build { textField in
+        textField.addTarget(self, action: #selector(self.didTextChange), for: .editingChanged)
+        textField.font = DefaultDynamicFontHelper.preferredFont(withTextStyle: .callout, size: UX.fontSize)
+        textField.setContentHuggingPriority(.defaultLow, for: .horizontal)
+        textField.setContentCompressionResistancePriority(.defaultLow, for: .horizontal)
+        textField.adjustsFontForContentSizeCategory = true
+        textField.autocapitalizationType = .none
+        textField.autocorrectionType = .no
+        textField.inputAssistantItem.leadingBarButtonGroups = []
+        textField.inputAssistantItem.trailingBarButtonGroups = []
+        textField.enablesReturnKeyAutomatically = true
+        textField.returnKeyType = .search
+        textField.delegate = self
+    }
+
+    private lazy var matchCountView: UILabel = .build { label in
+        label.font = DefaultDynamicFontHelper.preferredFont(withTextStyle: .callout, size: UX.fontSize)
+        label.isHidden = true
+        label.setContentHuggingPriority(.defaultHigh, for: .horizontal)
+        label.setContentCompressionResistancePriority(.defaultHigh, for: .horizontal)
+        label.adjustsFontForContentSizeCategory = true
+    }
+
+    private lazy var previousButton: UIButton = .build { button in
+        button.setImage(UIImage(named: StandardImageIdentifiers.Large.chevronUp), for: .normal)
+        button.addTarget(self, action: #selector(self.didFindPrevious), for: .touchUpInside)
+    }
+
+    private lazy var nextButton: UIButton = .build { button in
+        button.setImage(UIImage(named: StandardImageIdentifiers.Large.chevronDown), for: .normal)
+        button.addTarget(self, action: #selector(self.didFindNext), for: .touchUpInside)
+    }
+
+    private lazy var closeButton: UIButton = .build { button in
+        button.setImage(UIImage(named: StandardImageIdentifiers.Medium.cross), for: .normal)
+        button.addTarget(self, action: #selector(self.didPressClose), for: .touchUpInside)
+    }
+
+    var currentResult = 0 {
+        didSet {
+            if totalResults > UX.totalResultsMax {
+                matchCountView.text = "\(currentResult)/\(UX.totalResultsMax)+"
+            } else {
+                matchCountView.text = "\(currentResult)/\(totalResults)"
+            }
+        }
+    }
+
+    var totalResults = 0 {
+        didSet {
+            if totalResults > UX.totalResultsMax {
+                matchCountView.text = "\(currentResult)/\(UX.totalResultsMax)+"
+            } else {
+                matchCountView.text = "\(currentResult)/\(totalResults)"
+            }
+            previousButton.isEnabled = totalResults > 1
+            nextButton.isEnabled = previousButton.isEnabled
+        }
+    }
+
+    var text: String? {
+        get {
+            return searchText.text
+        }
+
+        set {
+            searchText.text = newValue
+            didTextChange(searchText)
+        }
+    }
+
+    override init(frame: CGRect) {
+        super.init(frame: frame)
+
+        backgroundColor = .white
+
+        addSubviews(searchText, matchCountView, previousButton, nextButton, closeButton, topBorder)
+
+        NSLayoutConstraint.activate([
+            searchText.leadingAnchor.constraint(equalTo: leadingAnchor, constant: 8),
+            searchText.topAnchor.constraint(equalTo: topAnchor),
+            searchText.bottomAnchor.constraint(equalTo: bottomAnchor),
+
+            matchCountView.leadingAnchor.constraint(equalTo: searchText.trailingAnchor),
+            matchCountView.centerYAnchor.constraint(equalTo: centerYAnchor),
+
+            previousButton.leadingAnchor.constraint(equalTo: matchCountView.trailingAnchor),
+            previousButton.widthAnchor.constraint(equalTo: heightAnchor),
+            previousButton.heightAnchor.constraint(equalTo: heightAnchor),
+            previousButton.centerYAnchor.constraint(equalTo: centerYAnchor),
+
+            nextButton.leadingAnchor.constraint(equalTo: previousButton.trailingAnchor),
+            nextButton.widthAnchor.constraint(equalTo: heightAnchor),
+            nextButton.heightAnchor.constraint(equalTo: heightAnchor),
+            nextButton.centerYAnchor.constraint(equalTo: centerYAnchor),
+
+            closeButton.leadingAnchor.constraint(equalTo: nextButton.trailingAnchor),
+            closeButton.widthAnchor.constraint(equalTo: heightAnchor),
+            closeButton.heightAnchor.constraint(equalTo: heightAnchor),
+            closeButton.trailingAnchor.constraint(equalTo: trailingAnchor),
+            closeButton.centerYAnchor.constraint(equalTo: centerYAnchor),
+
+            topBorder.heightAnchor.constraint(equalToConstant: 1),
+            topBorder.leadingAnchor.constraint(equalTo: leadingAnchor),
+            topBorder.trailingAnchor.constraint(equalTo: trailingAnchor),
+            topBorder.topAnchor.constraint(equalTo: topAnchor)
+        ])
+    }
+
+    required init?(coder aDecoder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+    @discardableResult
+    override func becomeFirstResponder() -> Bool {
+        searchText.becomeFirstResponder()
+        return super.becomeFirstResponder()
+    }
+
+    @objc
+    private func didFindPrevious(_ sender: UIButton) {
+        delegate?.findInPage(self, findPreviousWithText: searchText.text ?? "")
+    }
+
+    @objc
+    private func didFindNext(_ sender: UIButton) {
+        delegate?.findInPage(self, findNextWithText: searchText.text ?? "")
+    }
+
+    @objc
+    private func didTextChange(_ sender: UITextField) {
+        matchCountView.isHidden = searchText.text?.trimmingCharacters(in: .whitespaces).isEmpty ?? true
+        delegate?.findInPage(self, textChanged: searchText.text ?? "")
+    }
+
+    @objc
+    private func didPressClose(_ sender: UIButton) {
+        delegate?.findInPageDidPressClose(self)
+    }
+
+    // MARK: - Theme Applicable
+
+    func applyTheme(theme: Theme) {
+        let colors = theme.colors
+        topBorder.backgroundColor = colors.borderPrimary
+        searchText.textColor = theme.type == .light ? colors.textPrimary : colors.textInverted
+        matchCountView.textColor = colors.actionSecondary
+        previousButton.setTitleColor(colors.iconPrimary, for: .normal)
+        nextButton.setTitleColor(colors.iconPrimary, for: .normal)
+        closeButton.setTitleColor(colors.iconPrimary, for: .normal)
+    }
+
+    // MARK: - UITextFieldDelegate
+
+    // Keyboard with a .search returnKeyType doesn't dismiss when return pressed. Handle this manually.
+    func textField(
+        _ textField: UITextField,
+        shouldChangeCharactersIn range: NSRange,
+        replacementString string: String
+    ) -> Bool {
+        if string == "\n" {
+            textField.resignFirstResponder()
+            return false
+        }
+        return true
+    }
+}
diff --git a/SampleBrowser/SampleBrowser/UI/RootViewController.swift b/SampleBrowser/SampleBrowser/UI/RootViewController.swift
index 0dcb6bc109f5..6ddde93686b5 100644
--- a/SampleBrowser/SampleBrowser/UI/RootViewController.swift
+++ b/SampleBrowser/SampleBrowser/UI/RootViewController.swift
@@ -2,6 +2,7 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at http://mozilla.org/MPL/2.0/
 
+import Common
 import UIKit
 
 // Holds toolbar, search bar, search and browser VCs
@@ -11,7 +12,8 @@ class RootViewController: UIViewController,
                           SearchBarDelegate,
                           SearchSuggestionDelegate,
                           MenuDelegate,
-                          SettingsDelegate {
+                          SettingsDelegate,
+                          FindInPageBarDelegate {
     private lazy var toolbar: BrowserToolbar = .build { _ in }
     private lazy var searchBar: BrowserSearchBar =  .build { _ in }
     private lazy var statusBarFiller: UIView =  .build { view in
@@ -20,6 +22,7 @@ class RootViewController: UIViewController,
 
     private var browserVC: BrowserViewController
     private var searchVC: SearchViewController
+    private var findInPageBar: FindInPageBar?
 
     // MARK: - Init
 
@@ -148,6 +151,18 @@ class RootViewController: UIViewController,
         searchBar.setSearchBarText(url)
     }
 
+    func onFindInPage(selected: String) {
+        showFindInPage()
+    }
+
+    func onFindInPage(currentResult: Int) {
+        findInPageBar?.currentResult = currentResult
+    }
+
+    func onFindInPage(totalResults: Int) {
+        findInPageBar?.totalResults = totalResults
+    }
+
     // MARK: - SearchBarDelegate
 
     func searchSuggestions(searchTerm: String) {
@@ -191,4 +206,41 @@ class RootViewController: UIViewController,
     func scrollToTop() {
         browserVC.scrollToTop()
     }
+
+    func showFindInPage() {
+        let findInPageBar = FindInPageBar()
+        findInPageBar.translatesAutoresizingMaskIntoConstraints = false
+        findInPageBar.delegate = self
+        self.findInPageBar = findInPageBar
+
+        view.addSubview(findInPageBar)
+
+        NSLayoutConstraint.activate([
+            findInPageBar.leadingAnchor.constraint(equalTo: view.leadingAnchor),
+            findInPageBar.bottomAnchor.constraint(equalTo: toolbar.topAnchor),
+            findInPageBar.trailingAnchor.constraint(equalTo: view.trailingAnchor),
+            findInPageBar.heightAnchor.constraint(equalToConstant: 46)
+        ])
+    }
+
+    // MARK: - FindInPageBarDelegate
+
+    func findInPage(_ findInPage: FindInPageBar, textChanged text: String) {
+        browserVC.findInPage(text: text, function: .find)
+    }
+
+    func findInPage(_ findInPage: FindInPageBar, findPreviousWithText text: String) {
+        browserVC.findInPage(text: text, function: .findPrevious)
+    }
+
+    func findInPage(_ findInPage: FindInPageBar, findNextWithText text: String) {
+        browserVC.findInPage(text: text, function: .findNext)
+    }
+
+    func findInPageDidPressClose(_ findInPage: FindInPageBar) {
+        browserVC.findInPageDone()
+        findInPageBar?.endEditing(true)
+        findInPageBar?.removeFromSuperview()
+        findInPageBar = nil
+    }
 }
diff --git a/SampleBrowser/SampleBrowser/UI/Settings/SettingsDelegate.swift b/SampleBrowser/SampleBrowser/UI/Settings/SettingsDelegate.swift
index ce844667521f..62d566cec4eb 100644
--- a/SampleBrowser/SampleBrowser/UI/Settings/SettingsDelegate.swift
+++ b/SampleBrowser/SampleBrowser/UI/Settings/SettingsDelegate.swift
@@ -6,4 +6,5 @@ import Foundation
 
 protocol SettingsDelegate: AnyObject {
     func scrollToTop()
+    func showFindInPage()
 }
diff --git a/SampleBrowser/SampleBrowser/UI/Settings/SettingsViewController.swift b/SampleBrowser/SampleBrowser/UI/Settings/SettingsViewController.swift
index 9cc7b57a4944..6a2d83d9f505 100644
--- a/SampleBrowser/SampleBrowser/UI/Settings/SettingsViewController.swift
+++ b/SampleBrowser/SampleBrowser/UI/Settings/SettingsViewController.swift
@@ -84,7 +84,7 @@ class SettingsViewController: UIViewController, UITableViewDelegate {
         case .contentBlocking:
             break // TODO: FXIOS-8088 - Handle content blocking in WebEngine
         case .findInPage:
-            break // TODO: FXIOS-8087 - Handle find in page in WebEngine
+            delegate?.showFindInPage()
         case .scrollingToTop:
             delegate?.scrollToTop()
         case .zoom:
diff --git a/firefox-ios/Client.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved b/firefox-ios/Client.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
index 92c5104bbae6..5dbbdde82475 100644
--- a/firefox-ios/Client.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
+++ b/firefox-ios/Client.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
@@ -9,15 +9,6 @@
         "version" : "3.0.0-beta-1"
       }
     },
-    {
-      "identity" : "dip",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/AliSoftware/Dip.git",
-      "state" : {
-        "revision" : "c3b601df0ff22b06b6d5ff4943faf05c0bd3f9bb",
-        "version" : "7.1.1"
-      }
-    },
     {
       "identity" : "fuzi",
       "kind" : "remoteSourceControl",
@@ -63,15 +54,6 @@
         "version" : "3.8.9"
       }
     },
-    {
-      "identity" : "kingfisher",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/onevcat/Kingfisher.git",
-      "state" : {
-        "revision" : "3ec0ab0bca4feb56e8b33e289c9496e89059dd08",
-        "version" : "7.10.2"
-      }
-    },
     {
       "identity" : "lottie-ios",
       "kind" : "remoteSourceControl",
@@ -116,15 +98,6 @@
         "revision" : "e74fe2a978d1216c3602b129447c7301573cc2d8",
         "version" : "5.7.0"
       }
-    },
-    {
-      "identity" : "swiftybeaver",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/SwiftyBeaver/SwiftyBeaver.git",
-      "state" : {
-        "revision" : "1080914828ef1c9ca9cd2bad50667b3d847dabff",
-        "version" : "2.0.0"
-      }
     }
   ],
   "version" : 2

From 3746144cb7941e3595a33a19d23706824b029fd1 Mon Sep 17 00:00:00 2001
From: Laurie Marceau <lmarceau@mozilla.com>
Date: Wed, 7 Feb 2024 12:22:12 -0500
Subject: [PATCH 04/10] Add find in page content script tests

---
 .../Scripts/FindInPageContentScript.swift     |  5 +-
 .../WKWebview/Scripts/WKContentScript.swift   |  5 +-
 .../Scripts/WKContentScriptManager.swift      |  2 +-
 .../FindInPageContentScriptTests.swift        | 78 +++++++++++++++++++
 .../Mock/MockFindInPageDelegate.swift         | 23 ++++++
 .../Mock/MockWKContentScript.swift            |  4 +-
 .../Mock/MockWKContentScriptManager.swift     |  1 +
 7 files changed, 107 insertions(+), 11 deletions(-)
 create mode 100644 BrowserKit/Tests/WebEngineTests/FindInPageContentScriptTests.swift
 create mode 100644 BrowserKit/Tests/WebEngineTests/Mock/MockFindInPageDelegate.swift

diff --git a/BrowserKit/Sources/WebEngine/WKWebview/Scripts/FindInPageContentScript.swift b/BrowserKit/Sources/WebEngine/WKWebview/Scripts/FindInPageContentScript.swift
index a15bddf9f1f1..19518c9ad0de 100644
--- a/BrowserKit/Sources/WebEngine/WKWebview/Scripts/FindInPageContentScript.swift
+++ b/BrowserKit/Sources/WebEngine/WKWebview/Scripts/FindInPageContentScript.swift
@@ -39,10 +39,9 @@ class FindInPageContentScript: WKContentScript {
     }
 
     func userContentController(
-        _ userContentController: WKUserContentController,
-        didReceiveScriptMessage message: WKScriptMessage
+        didReceiveMessage message: Any
     ) {
-        guard let parameters = message.body as? [String: Int] else {
+        guard let parameters = message as? [String: Int] else {
             // TODO: FXIOS-6463 - Integrate message handler check
             logger.log("FindInPage.js sent wrong type of message",
                        level: .warning,
diff --git a/BrowserKit/Sources/WebEngine/WKWebview/Scripts/WKContentScript.swift b/BrowserKit/Sources/WebEngine/WKWebview/Scripts/WKContentScript.swift
index c392e341ad50..20606c083c38 100644
--- a/BrowserKit/Sources/WebEngine/WKWebview/Scripts/WKContentScript.swift
+++ b/BrowserKit/Sources/WebEngine/WKWebview/Scripts/WKContentScript.swift
@@ -12,10 +12,7 @@ protocol WKContentScript {
 
     func scriptMessageHandlerNames() -> [String]
 
-    func userContentController(
-        _ userContentController: WKUserContentController,
-        didReceiveScriptMessage message: WKScriptMessage
-    )
+    func userContentController(didReceiveMessage message: Any)
 
     func prepareForDeinit()
 }
diff --git a/BrowserKit/Sources/WebEngine/WKWebview/Scripts/WKContentScriptManager.swift b/BrowserKit/Sources/WebEngine/WKWebview/Scripts/WKContentScriptManager.swift
index a3b02734758f..ed8d26359e3f 100644
--- a/BrowserKit/Sources/WebEngine/WKWebview/Scripts/WKContentScriptManager.swift
+++ b/BrowserKit/Sources/WebEngine/WKWebview/Scripts/WKContentScriptManager.swift
@@ -60,7 +60,7 @@ class DefaultContentScriptManager: NSObject, WKContentScriptManager {
     func userContentController(_ userContentController: WKUserContentController,
                                didReceive message: WKScriptMessage) {
         for script in scripts.values where script.scriptMessageHandlerNames().contains(message.name) {
-            script.userContentController(userContentController, didReceiveScriptMessage: message)
+            script.userContentController(didReceiveMessage: message.body)
             return
         }
     }
diff --git a/BrowserKit/Tests/WebEngineTests/FindInPageContentScriptTests.swift b/BrowserKit/Tests/WebEngineTests/FindInPageContentScriptTests.swift
new file mode 100644
index 000000000000..2b6675d94761
--- /dev/null
+++ b/BrowserKit/Tests/WebEngineTests/FindInPageContentScriptTests.swift
@@ -0,0 +1,78 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/
+
+import XCTest
+@testable import WebEngine
+
+final class FindInPageContentScriptTests: XCTestCase {
+    private var findInPageDelegate: MockFindInPageHelperDelegate!
+
+    override func setUp() {
+        super.setUp()
+        findInPageDelegate = MockFindInPageHelperDelegate()
+    }
+
+    override func tearDown() {
+        super.tearDown()
+        findInPageDelegate = nil
+    }
+
+    func testDidReceiveMessageGivenEmptyMessageThenNoDelegateCalled() {
+        let subject = FindInPageContentScript()
+        subject.delegate = findInPageDelegate
+
+        subject.userContentController(didReceiveMessage: [])
+
+        XCTAssertEqual(findInPageDelegate.didUpdateCurrentResultCalled, 0)
+        XCTAssertEqual(findInPageDelegate.didUpdateTotalResultsCalled, 0)
+    }
+
+    func testDidReceiveMessageGivenStringMessageThenNoDelegateCalled() {
+        let subject = FindInPageContentScript()
+        subject.delegate = findInPageDelegate
+
+        subject.userContentController(didReceiveMessage: ["": ""])
+
+        XCTAssertEqual(findInPageDelegate.didUpdateCurrentResultCalled, 0)
+        XCTAssertEqual(findInPageDelegate.didUpdateTotalResultsCalled, 0)
+    }
+
+    func testDidReceiveMessageGivenCurrentResultMessageThenDelegateCalled() {
+        let subject = FindInPageContentScript()
+        subject.delegate = findInPageDelegate
+        let currentResult = 1
+
+        subject.userContentController(didReceiveMessage: ["currentResult": currentResult])
+
+        XCTAssertEqual(findInPageDelegate.didUpdateCurrentResultCalled, 1)
+        XCTAssertEqual(findInPageDelegate.savedCurrentResult, currentResult)
+        XCTAssertEqual(findInPageDelegate.didUpdateTotalResultsCalled, 0)
+    }
+
+    func testDidReceiveMessageGivenTotalResultMessageThenDelegateCalled() {
+        let subject = FindInPageContentScript()
+        subject.delegate = findInPageDelegate
+        let totalResult = 10
+
+        subject.userContentController(didReceiveMessage: ["totalResults": totalResult])
+
+        XCTAssertEqual(findInPageDelegate.didUpdateCurrentResultCalled, 0)
+        XCTAssertEqual(findInPageDelegate.didUpdateTotalResultsCalled, 1)
+        XCTAssertEqual(findInPageDelegate.savedTotalResults, totalResult)
+    }
+
+    func testDidReceiveMessageGivenTotalAndCurrentResultsMessageThenDelegateCalled() {
+        let subject = FindInPageContentScript()
+        subject.delegate = findInPageDelegate
+        let totalResult = 15
+        let currentResult = 20
+
+        subject.userContentController(didReceiveMessage: ["totalResults": totalResult, "currentResult": currentResult])
+
+        XCTAssertEqual(findInPageDelegate.didUpdateCurrentResultCalled, 1)
+        XCTAssertEqual(findInPageDelegate.savedCurrentResult, currentResult)
+        XCTAssertEqual(findInPageDelegate.didUpdateTotalResultsCalled, 1)
+        XCTAssertEqual(findInPageDelegate.savedTotalResults, totalResult)
+    }
+}
diff --git a/BrowserKit/Tests/WebEngineTests/Mock/MockFindInPageDelegate.swift b/BrowserKit/Tests/WebEngineTests/Mock/MockFindInPageDelegate.swift
new file mode 100644
index 000000000000..619c5b9f0aee
--- /dev/null
+++ b/BrowserKit/Tests/WebEngineTests/Mock/MockFindInPageDelegate.swift
@@ -0,0 +1,23 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/
+
+import Foundation
+@testable import WebEngine
+
+class MockFindInPageHelperDelegate: FindInPageHelperDelegate {
+    var didUpdateCurrentResultCalled = 0
+    var didUpdateTotalResultsCalled = 0
+    var savedCurrentResult = 0
+    var savedTotalResults = 0
+
+    func findInPageHelper(didUpdateCurrentResult currentResult: Int) {
+        savedCurrentResult = currentResult
+        didUpdateCurrentResultCalled += 1
+    }
+    
+    func findInPageHelper(didUpdateTotalResults totalResults: Int) {
+        savedTotalResults = totalResults
+        didUpdateTotalResultsCalled += 1
+    }
+}
diff --git a/BrowserKit/Tests/WebEngineTests/Mock/MockWKContentScript.swift b/BrowserKit/Tests/WebEngineTests/Mock/MockWKContentScript.swift
index 7c15a6b2a7b1..14edad32fb1c 100644
--- a/BrowserKit/Tests/WebEngineTests/Mock/MockWKContentScript.swift
+++ b/BrowserKit/Tests/WebEngineTests/Mock/MockWKContentScript.swift
@@ -3,7 +3,6 @@
 // file, You can obtain one at http://mozilla.org/MPL/2.0/
 
 import Foundation
-import WebKit
 @testable import WebEngine
 
 class MockWKContentScript: WKContentScript {
@@ -20,8 +19,7 @@ class MockWKContentScript: WKContentScript {
         return ["MockWKContentScriptHandler"]
     }
 
-    func userContentController(_ userContentController: WKUserContentController,
-                               didReceiveScriptMessage message: WKScriptMessage) {
+    func userContentController(didReceiveMessage message: Any) {
         userContentControllerCalled += 1
     }
 
diff --git a/BrowserKit/Tests/WebEngineTests/Mock/MockWKContentScriptManager.swift b/BrowserKit/Tests/WebEngineTests/Mock/MockWKContentScriptManager.swift
index 7cb71681d480..9f23c71db409 100644
--- a/BrowserKit/Tests/WebEngineTests/Mock/MockWKContentScriptManager.swift
+++ b/BrowserKit/Tests/WebEngineTests/Mock/MockWKContentScriptManager.swift
@@ -7,6 +7,7 @@ import WebKit
 @testable import WebEngine
 
 class MockWKContentScriptManager: NSObject, WKContentScriptManager {
+    var scripts = [String: WKContentScript]()
     var addContentScriptCalled = 0
     var addContentScriptToPageCalled = 0
     var uninstallCalled = 0

From b68cd6f46afe143d1b3952031b1cbdd09261a5f0 Mon Sep 17 00:00:00 2001
From: Laurie Marceau <lmarceau@mozilla.com>
Date: Wed, 7 Feb 2024 12:24:30 -0500
Subject: [PATCH 05/10] Revert change

---
 .../WebEngine/WKWebview/Scripts/WKUserScriptManager.swift   | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/BrowserKit/Sources/WebEngine/WKWebview/Scripts/WKUserScriptManager.swift b/BrowserKit/Sources/WebEngine/WKWebview/Scripts/WKUserScriptManager.swift
index 7745e6370f1c..afd1af0ded54 100644
--- a/BrowserKit/Sources/WebEngine/WKWebview/Scripts/WKUserScriptManager.swift
+++ b/BrowserKit/Sources/WebEngine/WKWebview/Scripts/WKUserScriptManager.swift
@@ -12,7 +12,7 @@ protocol WKUserScriptManager {
 
 class DefaultUserScriptManager: WKUserScriptManager {
     // Scripts can use this to verify the application (not JS on the web) is calling into them
-    static let appIdToken = UUID().uuidString
+    private let appIdToken = UUID().uuidString
     private let scriptProvider: UserScriptProvider
     var compiledUserScripts = [String: WKUserScript]()
 
@@ -68,7 +68,7 @@ class DefaultUserScriptManager: WKUserScriptManager {
     private func injectFrameScript(name: String, userScriptInfo: UserScriptInfo) {
         guard let source = scriptProvider.getScript(for: name) else { return }
 
-        let wrappedSource = "(function() { const APP_ID_TOKEN = '\(DefaultUserScriptManager.appIdToken)'; \(source) })()"
+        let wrappedSource = "(function() { const APP_ID_TOKEN = '\(appIdToken)'; \(source) })()"
         // Create in default content world
         let userScript = WKUserScript(source: wrappedSource,
                                       injectionTime: userScriptInfo.injectionTime,
@@ -81,7 +81,7 @@ class DefaultUserScriptManager: WKUserScriptManager {
         let webcompatName = "Webcompat\(name)"
         guard let source = scriptProvider.getScript(for: webcompatName) else { return }
 
-        let wrappedSource = "(function() { const APP_ID_TOKEN = '\(DefaultUserScriptManager.appIdToken)'; \(source) })()"
+        let wrappedSource = "(function() { const APP_ID_TOKEN = '\(appIdToken)'; \(source) })()"
         // Create in page content world
         let userScript = WKUserScript(source: wrappedSource,
                                       injectionTime: userScriptInfo.injectionTime,

From f16764a355d0f10debcf20314b18bf3eaceae96d Mon Sep 17 00:00:00 2001
From: Laurie Marceau <lmarceau@mozilla.com>
Date: Wed, 7 Feb 2024 12:26:31 -0500
Subject: [PATCH 06/10] Swiftlint

---
 BrowserKit/Sources/WebEngine/WKWebview/WKEngineSession.swift   | 3 ++-
 .../Tests/WebEngineTests/Mock/MockFindInPageDelegate.swift     | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/BrowserKit/Sources/WebEngine/WKWebview/WKEngineSession.swift b/BrowserKit/Sources/WebEngine/WKWebview/WKEngineSession.swift
index 49b7a4cfd212..6bea2ed15158 100644
--- a/BrowserKit/Sources/WebEngine/WKWebview/WKEngineSession.swift
+++ b/BrowserKit/Sources/WebEngine/WKWebview/WKEngineSession.swift
@@ -14,7 +14,8 @@ class WKEngineSession: NSObject,
     weak var delegate: EngineSessionDelegate?
     weak var findInPageDelegate: FindInPageHelperDelegate? {
         didSet {
-            guard let findInPage = contentScriptManager.scripts[FindInPageContentScript.name()] as? FindInPageContentScript else { return }
+            let script = contentScriptManager.scripts[FindInPageContentScript.name()]
+            guard let findInPage = script as? FindInPageContentScript else { return }
             findInPage.delegate = findInPageDelegate
         }
     }
diff --git a/BrowserKit/Tests/WebEngineTests/Mock/MockFindInPageDelegate.swift b/BrowserKit/Tests/WebEngineTests/Mock/MockFindInPageDelegate.swift
index 619c5b9f0aee..f4d42b22c7d7 100644
--- a/BrowserKit/Tests/WebEngineTests/Mock/MockFindInPageDelegate.swift
+++ b/BrowserKit/Tests/WebEngineTests/Mock/MockFindInPageDelegate.swift
@@ -15,7 +15,7 @@ class MockFindInPageHelperDelegate: FindInPageHelperDelegate {
         savedCurrentResult = currentResult
         didUpdateCurrentResultCalled += 1
     }
-    
+
     func findInPageHelper(didUpdateTotalResults totalResults: Int) {
         savedTotalResults = totalResults
         didUpdateTotalResultsCalled += 1

From 069fc475d040f12a13db2283035c52d92441666b Mon Sep 17 00:00:00 2001
From: Laurie Marceau <lmarceau@mozilla.com>
Date: Wed, 7 Feb 2024 12:48:11 -0500
Subject: [PATCH 07/10] Add sanitization input tests

---
 .../WebEngine/WKWebview/WKEngineSession.swift |  4 +-
 .../Mock/MockWKEngineWebView.swift            | 10 +++
 .../WebEngineTests/WKEngineSessionTests.swift | 63 +++++++++++++++++++
 3 files changed, 75 insertions(+), 2 deletions(-)

diff --git a/BrowserKit/Sources/WebEngine/WKWebview/WKEngineSession.swift b/BrowserKit/Sources/WebEngine/WKWebview/WKEngineSession.swift
index 6bea2ed15158..cce854a80988 100644
--- a/BrowserKit/Sources/WebEngine/WKWebview/WKEngineSession.swift
+++ b/BrowserKit/Sources/WebEngine/WKWebview/WKEngineSession.swift
@@ -126,8 +126,8 @@ class WKEngineSession: NSObject,
     }
 
     func findInPage(text: String, function: FindInPageFunction) {
-        let escaped = text.replacingOccurrences(of: "\\", with: "\\\\").replacingOccurrences(of: "\"", with: "\\\"")
-        webView.evaluateJavascriptInDefaultContentWorld("__firefox__.\(function.rawValue)(\"\(escaped)\")")
+        let sanitizedInput = text.replacingOccurrences(of: "\\", with: "\\\\").replacingOccurrences(of: "\"", with: "\\\"")
+        webView.evaluateJavascriptInDefaultContentWorld("__firefox__.\(function.rawValue)(\"\(sanitizedInput)\")")
     }
 
     func findInPageDone() {
diff --git a/BrowserKit/Tests/WebEngineTests/Mock/MockWKEngineWebView.swift b/BrowserKit/Tests/WebEngineTests/Mock/MockWKEngineWebView.swift
index 4fdc2741f238..f75c85a0f757 100644
--- a/BrowserKit/Tests/WebEngineTests/Mock/MockWKEngineWebView.swift
+++ b/BrowserKit/Tests/WebEngineTests/Mock/MockWKEngineWebView.swift
@@ -36,6 +36,8 @@ class MockWKEngineWebView: UIView, WKEngineWebView {
     var removeFromSuperviewCalled = 0
     var addObserverCalled = 0
     var removeObserverCalled = 0
+    var evaluateJavaScriptCalled = 0
+    var savedJavaScript: String?
 
     var loadFileReadAccessURL: URL?
 
@@ -105,4 +107,12 @@ class MockWKEngineWebView: UIView, WKEngineWebView {
                                  forKeyPath keyPath: String) {
         removeObserverCalled += 1
     }
+
+    func evaluateJavaScript(_ javaScript: String, 
+                            in frame: WKFrameInfo?,
+                            in contentWorld: WKContentWorld,
+                            completionHandler: ((Result<Any, Error>) -> Void)?) {
+        evaluateJavaScriptCalled += 1
+        savedJavaScript = javaScript
+    }
 }
diff --git a/BrowserKit/Tests/WebEngineTests/WKEngineSessionTests.swift b/BrowserKit/Tests/WebEngineTests/WKEngineSessionTests.swift
index 74247b68ad9b..ed1b5c8856d8 100644
--- a/BrowserKit/Tests/WebEngineTests/WKEngineSessionTests.swift
+++ b/BrowserKit/Tests/WebEngineTests/WKEngineSessionTests.swift
@@ -134,6 +134,69 @@ final class WKEngineSessionTests: XCTestCase {
         prepareForTearDown(subject!)
     }
 
+    // MARK: Find in page
+
+    func testFindInPageTextGivenFindAllThenJavascriptCalled() {
+        let subject = createSubject()
+
+        subject?.findInPage(text: "Banana", function: .find)
+
+        XCTAssertEqual(webViewProvider.webView.evaluateJavaScriptCalled, 1)
+        XCTAssertEqual(webViewProvider.webView.savedJavaScript, "__firefox__.find(\"Banana\")")
+        prepareForTearDown(subject!)
+    }
+
+
+    func testFindInPageTextGivenFindNextThenJavascriptCalled() {
+        let subject = createSubject()
+
+        subject?.findInPage(text: "Banana", function: .findNext)
+
+        XCTAssertEqual(webViewProvider.webView.evaluateJavaScriptCalled, 1)
+        XCTAssertEqual(webViewProvider.webView.savedJavaScript, "__firefox__.findNext(\"Banana\")")
+        prepareForTearDown(subject!)
+    }
+
+    func testFindInPageTextGivenFindPreviousThenJavascriptCalled() {
+        let subject = createSubject()
+
+        subject?.findInPage(text: "Banana", function: .findPrevious)
+
+        XCTAssertEqual(webViewProvider.webView.evaluateJavaScriptCalled, 1)
+        XCTAssertEqual(webViewProvider.webView.savedJavaScript, "__firefox__.findPrevious(\"Banana\")")
+        prepareForTearDown(subject!)
+    }
+
+    func testFindInPageTextGivenMaliciousAlertCodeThenIsSanitized() {
+        let subject = createSubject()
+        let maliciousTextWithAlert = "'; alert('Malicious code injected!'); '"
+        subject?.findInPage(text: maliciousTextWithAlert, function: .find)
+
+        XCTAssertEqual(webViewProvider.webView.evaluateJavaScriptCalled, 1)
+        XCTAssertEqual(webViewProvider.webView.savedJavaScript, "__firefox__.find(\"\'; alert(\'Malicious code injected!\'); \'\")")
+        prepareForTearDown(subject!)
+    }
+
+    func testFindInPageTextGivenMaliciousBrokenJsStringCodeThenIsSanitized() {
+        let subject = createSubject()
+        let maliciousText = "; maliciousFunction(); ";
+        subject?.findInPage(text: maliciousText, function: .find)
+
+        XCTAssertEqual(webViewProvider.webView.evaluateJavaScriptCalled, 1)
+        XCTAssertEqual(webViewProvider.webView.savedJavaScript, "__firefox__.find(\"; maliciousFunction(); \")")
+        prepareForTearDown(subject!)
+    }
+
+    func testFindInPageDoneThenJavascriptCalled() {
+        let subject = createSubject()
+
+        subject?.findInPageDone()
+
+        XCTAssertEqual(webViewProvider.webView.evaluateJavaScriptCalled, 1)
+        XCTAssertEqual(webViewProvider.webView.savedJavaScript, "__firefox__.findDone()")
+        prepareForTearDown(subject!)
+    }
+
     // MARK: Reload
 
     func testReloadThenCallsReloadFromOrigin() {

From 03e1ef8b772e799e2085db26603494e79beb75e8 Mon Sep 17 00:00:00 2001
From: Laurie Marceau <lmarceau@mozilla.com>
Date: Wed, 7 Feb 2024 12:53:08 -0500
Subject: [PATCH 08/10] Add find in page delegate test

---
 .../Mock/MockWKContentScriptManager.swift          |  2 ++
 .../WebEngineTests/WKEngineSessionTests.swift      | 14 ++++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/BrowserKit/Tests/WebEngineTests/Mock/MockWKContentScriptManager.swift b/BrowserKit/Tests/WebEngineTests/Mock/MockWKContentScriptManager.swift
index 9f23c71db409..249db89909f4 100644
--- a/BrowserKit/Tests/WebEngineTests/Mock/MockWKContentScriptManager.swift
+++ b/BrowserKit/Tests/WebEngineTests/Mock/MockWKContentScriptManager.swift
@@ -19,6 +19,7 @@ class MockWKContentScriptManager: NSObject, WKContentScriptManager {
     func addContentScript(_ script: WKContentScript,
                           name: String,
                           forSession session: WKEngineSession) {
+        scripts[name] = script
         savedContentScriptNames.append(name)
         addContentScriptCalled += 1
     }
@@ -26,6 +27,7 @@ class MockWKContentScriptManager: NSObject, WKContentScriptManager {
     func addContentScriptToPage(_ script: WKContentScript,
                                 name: String,
                                 forSession session: WKEngineSession) {
+        scripts[name] = script
         savedContentScriptPageNames.append(name)
         addContentScriptToPageCalled += 1
     }
diff --git a/BrowserKit/Tests/WebEngineTests/WKEngineSessionTests.swift b/BrowserKit/Tests/WebEngineTests/WKEngineSessionTests.swift
index ed1b5c8856d8..f5d3a65d4004 100644
--- a/BrowserKit/Tests/WebEngineTests/WKEngineSessionTests.swift
+++ b/BrowserKit/Tests/WebEngineTests/WKEngineSessionTests.swift
@@ -11,6 +11,7 @@ final class WKEngineSessionTests: XCTestCase {
     private var contentScriptManager: MockWKContentScriptManager!
     private var userScriptManager: MockWKUserScriptManager!
     private var engineSessionDelegate: MockEngineSessionDelegate!
+    private var findInPageDelegate: MockFindInPageHelperDelegate!
 
     override func setUp() {
         super.setUp()
@@ -19,6 +20,7 @@ final class WKEngineSessionTests: XCTestCase {
         contentScriptManager = MockWKContentScriptManager()
         userScriptManager = MockWKUserScriptManager()
         engineSessionDelegate = MockEngineSessionDelegate()
+        findInPageDelegate = MockFindInPageHelperDelegate()
     }
 
     override func tearDown() {
@@ -28,6 +30,7 @@ final class WKEngineSessionTests: XCTestCase {
         contentScriptManager = nil
         userScriptManager = nil
         engineSessionDelegate = nil
+        findInPageDelegate = nil
     }
 
     // MARK: Load URL
@@ -197,6 +200,17 @@ final class WKEngineSessionTests: XCTestCase {
         prepareForTearDown(subject!)
     }
 
+    func testFindInPageDelegateIsSetProperly() {
+        let subject = createSubject()
+
+        subject?.findInPageDelegate = findInPageDelegate
+        let script = contentScriptManager.scripts[FindInPageContentScript.name()] as! FindInPageContentScript
+        script.userContentController(didReceiveMessage: ["currentResult": 10])
+
+        XCTAssertEqual(findInPageDelegate.didUpdateCurrentResultCalled, 1)
+        prepareForTearDown(subject!)
+    }
+
     // MARK: Reload
 
     func testReloadThenCallsReloadFromOrigin() {

From 76312b279c2fc587546852a1b021d600c1f10f2f Mon Sep 17 00:00:00 2001
From: Laurie Marceau <lmarceau@mozilla.com>
Date: Wed, 7 Feb 2024 12:55:24 -0500
Subject: [PATCH 09/10] Revert package change

---
 .../xcshareddata/swiftpm/Package.resolved     | 27 +++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/firefox-ios/Client.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved b/firefox-ios/Client.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
index 5dbbdde82475..92c5104bbae6 100644
--- a/firefox-ios/Client.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
+++ b/firefox-ios/Client.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
@@ -9,6 +9,15 @@
         "version" : "3.0.0-beta-1"
       }
     },
+    {
+      "identity" : "dip",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/AliSoftware/Dip.git",
+      "state" : {
+        "revision" : "c3b601df0ff22b06b6d5ff4943faf05c0bd3f9bb",
+        "version" : "7.1.1"
+      }
+    },
     {
       "identity" : "fuzi",
       "kind" : "remoteSourceControl",
@@ -54,6 +63,15 @@
         "version" : "3.8.9"
       }
     },
+    {
+      "identity" : "kingfisher",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/onevcat/Kingfisher.git",
+      "state" : {
+        "revision" : "3ec0ab0bca4feb56e8b33e289c9496e89059dd08",
+        "version" : "7.10.2"
+      }
+    },
     {
       "identity" : "lottie-ios",
       "kind" : "remoteSourceControl",
@@ -98,6 +116,15 @@
         "revision" : "e74fe2a978d1216c3602b129447c7301573cc2d8",
         "version" : "5.7.0"
       }
+    },
+    {
+      "identity" : "swiftybeaver",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/SwiftyBeaver/SwiftyBeaver.git",
+      "state" : {
+        "revision" : "1080914828ef1c9ca9cd2bad50667b3d847dabff",
+        "version" : "2.0.0"
+      }
     }
   ],
   "version" : 2

From 1dbaf6af753012c8c1296643837b36b8f0f22737 Mon Sep 17 00:00:00 2001
From: Laurie Marceau <lmarceau@mozilla.com>
Date: Wed, 7 Feb 2024 12:58:09 -0500
Subject: [PATCH 10/10] Swiftlint

---
 .../Tests/WebEngineTests/Mock/MockWKEngineWebView.swift     | 2 +-
 BrowserKit/Tests/WebEngineTests/WKEngineSessionTests.swift  | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/BrowserKit/Tests/WebEngineTests/Mock/MockWKEngineWebView.swift b/BrowserKit/Tests/WebEngineTests/Mock/MockWKEngineWebView.swift
index f75c85a0f757..d7adcc6c09de 100644
--- a/BrowserKit/Tests/WebEngineTests/Mock/MockWKEngineWebView.swift
+++ b/BrowserKit/Tests/WebEngineTests/Mock/MockWKEngineWebView.swift
@@ -108,7 +108,7 @@ class MockWKEngineWebView: UIView, WKEngineWebView {
         removeObserverCalled += 1
     }
 
-    func evaluateJavaScript(_ javaScript: String, 
+    func evaluateJavaScript(_ javaScript: String,
                             in frame: WKFrameInfo?,
                             in contentWorld: WKContentWorld,
                             completionHandler: ((Result<Any, Error>) -> Void)?) {
diff --git a/BrowserKit/Tests/WebEngineTests/WKEngineSessionTests.swift b/BrowserKit/Tests/WebEngineTests/WKEngineSessionTests.swift
index f5d3a65d4004..3146644e3c88 100644
--- a/BrowserKit/Tests/WebEngineTests/WKEngineSessionTests.swift
+++ b/BrowserKit/Tests/WebEngineTests/WKEngineSessionTests.swift
@@ -149,7 +149,6 @@ final class WKEngineSessionTests: XCTestCase {
         prepareForTearDown(subject!)
     }
 
-
     func testFindInPageTextGivenFindNextThenJavascriptCalled() {
         let subject = createSubject()
 
@@ -176,13 +175,14 @@ final class WKEngineSessionTests: XCTestCase {
         subject?.findInPage(text: maliciousTextWithAlert, function: .find)
 
         XCTAssertEqual(webViewProvider.webView.evaluateJavaScriptCalled, 1)
-        XCTAssertEqual(webViewProvider.webView.savedJavaScript, "__firefox__.find(\"\'; alert(\'Malicious code injected!\'); \'\")")
+        let result = "__firefox__.find(\"\'; alert(\'Malicious code injected!\'); \'\")"
+        XCTAssertEqual(webViewProvider.webView.savedJavaScript, result)
         prepareForTearDown(subject!)
     }
 
     func testFindInPageTextGivenMaliciousBrokenJsStringCodeThenIsSanitized() {
         let subject = createSubject()
-        let maliciousText = "; maliciousFunction(); ";
+        let maliciousText = "; maliciousFunction(); "
         subject?.findInPage(text: maliciousText, function: .find)
 
         XCTAssertEqual(webViewProvider.webView.evaluateJavaScriptCalled, 1)