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[tor-commits] [Git][tpo/applications/tor-browser][tor-browser-115.11.0esr-13.5-1] 2 commits: Revert "Bug 41740: Change the RFP value of devicePixelRatio to 2"

Title: GitLab

richard pushed to branch tor-browser-115.11.0esr-13.5-1 at The Tor Project / Applications / Tor Browser

Commits:

  • 736fba53
    by Pier Angelo Vendrame at 2024-05-13T17:49:22+02:00 
    Revert "Bug 41740: Change the RFP value of devicePixelRatio to 2"

This reverts commit 94c39de65acb82efc7ecabbd7125f8d2aeb46d02.
  • 32a6f98c
    by Fatih at 2024-05-13T17:52:54+02:00 
    Bug 1830629: Remove unnecessary checks for pdf.js for RFP. r=tjr

resource:// is exempt from RFP, so we no longer need to check pdf.js specifically.

Differential Revision: https://phabricator.services.mozilla.com/D209359

1 changed file:

Changes:

  • dom/base/nsGlobalWindowInner.cpp
    ... ... @@ -3604,20 +3604,9 @@ double nsGlobalWindowInner::GetDevicePixelRatio(CallerType aCallerType,
    3604 3604 
         return 1.0;
    3605 3605 
       }
    3606 3606
    3607 
    -  if (nsIGlobalObject::ShouldResistFingerprinting(aCallerType,
    3608 
    -                                                  RFPTarget::Unknown)) {
    3609 
    -    // Spoofing the DevicePixelRatio causes blurriness in some situations
    3610 
    -    // on HiDPI displays. pdf.js is a non-system caller; but it can't
    3611 
    -    // expose the fingerprintable information, so we can safely disable
    3612 
    -    // spoofing in this situation. It doesn't address the issue for
    3613 
    -    // web-rendered content (including pdf.js instances on the web.)
    3614 
    -    // In the future we hope to have a better solution to fix all HiDPI
    3615 
    -    // blurriness...
    3616 
    -    nsAutoCString origin;
    3617 
    -    nsresult rv = this->GetPrincipal()->GetOrigin(origin);
    3618 
    -    if (NS_FAILED(rv) || origin != "resource://pdf.js"_ns) {
    3619 
    -      return 2.0;
    3620 
    -    }
    3607 
    +  if (nsIGlobalObject::ShouldResistFingerprinting(
    3608 
    +          aCallerType, RFPTarget::Unknown)) {
    3609 
    +    return 2.0;
    3621 3610 
       }
    3622 3611
    3623 3612 
       if (aCallerType == CallerType::NonSystem) {

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