diff --git a/lib/processor/linux.rb b/lib/processor/linux.rb
index 66c4a01..86cea48 100644
--- a/lib/processor/linux.rb
+++ b/lib/processor/linux.rb
@@ -53,6 +53,7 @@ def tweak_install
   "--safebrowsing-disable-download-protection",
   "--proxy-server=#{@proxyhost}:#{@proxyport}",
   "--user-data-dir=#{@profiledir}",
+  "--disable-features=OptimizationGuideModelDownloading,OptimizationHintsFetching,OptimizationTargetPrediction,OptimizationHints",
 ]
 
 if Process.uid == 0
diff --git a/lib/processor/macosx.rb b/lib/processor/macosx.rb
index b583206..9b1efae 100644
--- a/lib/processor/macosx.rb
+++ b/lib/processor/macosx.rb
@@ -64,6 +64,7 @@ def tweak_install
   "--use-mock-keychain",
   "--proxy-server=#{@proxyhost}:#{@proxyport}",
   "--user-data-dir=#{@profiledir}",
+  "--disable-features=OptimizationGuideModelDownloading,OptimizationHintsFetching,OptimizationTargetPrediction,OptimizationHints",
 ]
 
 if Process.uid == 0