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[tor-commits] [Git][tpo/applications/tor-browser][tor-browser-149.0a1-16.0-2] BB 44772: Disable efficient randomization for canvases.

Title: GitLab

Pier Angelo Vendrame pushed to branch tor-browser-149.0a1-16.0-2 at The Tor Project / Applications / Tor Browser

Commits:

  • 881103bb
    by Pier Angelo Vendrame at 2026-03-23T16:01:55+01:00 
    BB 44772: Disable efficient randomization for canvases.

Always use the regular randomization algorithm, instead.

1 changed file:

Changes:

  • dom/canvas/CanvasUtils.cpp
    ... ... @@ -382,14 +382,9 @@ ImageExtraction ImageExtractionResult(dom::HTMLCanvasElement* aCanvasElement,
    382 382 
         return ImageExtraction::Placeholder;
    383 383 
       }
    384 384
    385 
    -  if (ownerDoc->ShouldResistFingerprinting(
    386 
    -          RFPTarget::EfficientCanvasRandomization) &&
    387 
    -      GetCanvasExtractDataPermission(aPrincipal) !=
    388 
    -          nsIPermissionManager::ALLOW_ACTION) {
    389 
    -    return ImageExtraction::EfficientRandomize;
    390 
    -  }
    391 
    -
    392 
    -  if ((ownerDoc->ShouldResistFingerprinting(RFPTarget::CanvasRandomization) ||
    385 
    +  if ((ownerDoc->ShouldResistFingerprinting(
    386 
    +           RFPTarget::EfficientCanvasRandomization) ||
    387 
    +       ownerDoc->ShouldResistFingerprinting(RFPTarget::CanvasRandomization) ||
    393 388 
            ownerDoc->ShouldResistFingerprinting(RFPTarget::WebGLRandomization)) &&
    394 389 
           GetCanvasExtractDataPermission(aPrincipal) !=
    395 390 
               nsIPermissionManager::ALLOW_ACTION) {

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