Pier Angelo Vendrame pushed to branch tor-browser-150.0a1-16.0-2 at The Tor Project / Applications / Tor Browser

Commits:

• 7d0e7ae6
  by Pier Angelo Vendrame at 2026-04-27T09:06:32+02:00

  fixup! BB 44772: Disable efficient randomization for canvases.
  
  BB 44895: Revert "BB 44772: Disable efficient randomization for canvases."
  
  This reverts commit ced1d9a35c7d8cbb727d8c1c450b2dce62cd7289.
  
  We have investigated this issue more, and this change was not needed
  after all, therefore we can just revert this patch.
  

1 changed file:

• dom/canvas/CanvasUtils.cpp

Changes:

     return ImageExtraction::Placeholder;

   }

-  if ((ownerDoc->ShouldResistFingerprinting(

-           RFPTarget::EfficientCanvasRandomization) ||

-       ownerDoc->ShouldResistFingerprinting(RFPTarget::CanvasRandomization) ||

+  if (ownerDoc->ShouldResistFingerprinting(

+          RFPTarget::EfficientCanvasRandomization) &&

+      GetCanvasExtractDataPermission(aPrincipal) !=

+          nsIPermissionManager::ALLOW_ACTION) {

+    return ImageExtraction::EfficientRandomize;

+  }

+

+  if ((ownerDoc->ShouldResistFingerprinting(RFPTarget::CanvasRandomization) ||

        ownerDoc->ShouldResistFingerprinting(RFPTarget::WebGLRandomization)) &&

       GetCanvasExtractDataPermission(aPrincipal) !=

           nsIPermissionManager::ALLOW_ACTION) {