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[tor-commits] [Git][tpo/applications/tor-browser][tor-browser-150.0a1-16.0-2] fixup! BB 44772: Disable efficient randomization for canvases.

Title: GitLab

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:

Changes:

  • dom/canvas/CanvasUtils.cpp
    ... ... @@ -381,9 +381,14 @@ ImageExtraction ImageExtractionResult(dom::HTMLCanvasElement* aCanvasElement,
    381 381 
         return ImageExtraction::Placeholder;
    382 382 
       }
    383 383
    384 
    -  if ((ownerDoc->ShouldResistFingerprinting(
    385 
    -           RFPTarget::EfficientCanvasRandomization) ||
    386 
    -       ownerDoc->ShouldResistFingerprinting(RFPTarget::CanvasRandomization) ||
    384 
    +  if (ownerDoc->ShouldResistFingerprinting(
    385 
    +          RFPTarget::EfficientCanvasRandomization) &&
    386 
    +      GetCanvasExtractDataPermission(aPrincipal) !=
    387 
    +          nsIPermissionManager::ALLOW_ACTION) {
    388 
    +    return ImageExtraction::EfficientRandomize;
    389 
    +  }
    390 
    +
    391 
    +  if ((ownerDoc->ShouldResistFingerprinting(RFPTarget::CanvasRandomization) ||
    387 392 
            ownerDoc->ShouldResistFingerprinting(RFPTarget::WebGLRandomization)) &&
    388 393 
           GetCanvasExtractDataPermission(aPrincipal) !=
    389 394 
               nsIPermissionManager::ALLOW_ACTION) {

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