Bugfix FXIOS-8543 [v123.3] Check for felt privacy flag (backport #18978…

…) (#18981)

(cherry picked from commit 1c6f6b4)

Co-authored-by: OrlaM <[email protected]>

firefox-ios/Client/Frontend/Browser/BrowserViewController/Views/BrowserViewController.swift

@@ -1077,7 +1077,7 @@ class BrowserViewController: UIViewController,
     func showEmbeddedHomepage(inline: Bool, isPrivate: Bool) {
         resetDataClearanceCFRTimer()
 
-        guard !isPrivate else {
+        if isPrivate && featureFlags.isFeatureEnabled(.feltPrivacySimplifiedUI, checking: .buildOnly) {
             browserDelegate?.showPrivateHomepage(overlayManager: overlayManager)
             return
         }