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[tor-commits] [Git][tpo/applications/tor-browser][base-browser-102.15.0esr-12.5-1] Bug 42084: Ensure spoofing works even if preferences are set out of order.

Title: GitLab

ma1 pushed to branch base-browser-102.15.0esr-12.5-1 at The Tor Project / Applications / Tor Browser

Commits:

  • 60d54c03
    by hackademix at 2023-09-12T11:15:40+02:00 
    Bug 42084: Ensure spoofing works even if preferences are set out of order.

1 changed file:

Changes:

  • toolkit/components/resistfingerprinting/RFPHelper.jsm
    ... ... @@ -163,6 +163,9 @@ class _RFPHelper {
    163 163 
         // Add RFP and Letterboxing observers if prefs are enabled
    164 164 
         this._handleResistFingerprintingChanged();
    165 165 
         this._handleLetterboxingPrefChanged();
    166 
    +
    167 
    +    // Synchronize language preferences if accidentally messed up (tor-browser#42084)
    168 
    +    this._handleSpoofEnglishChanged();
    166 169 
       }
    167 170
    168 171 
       uninit() {
    ... ... @@ -216,6 +219,7 @@ class _RFPHelper {
    216 219 
             this._handleResistFingerprintingChanged();
    217 220 
             break;
    218 221 
           case kPrefSpoofEnglish:
    222 
    +      case "intl.accept_languages":
    219 223 
             this._handleSpoofEnglishChanged();
    220 224 
             break;
    221 225 
           case kPrefLetterboxing:
    ... ... @@ -264,6 +268,7 @@ class _RFPHelper {
    264 268 
       }
    265 269
    266 270 
       _handleSpoofEnglishChanged() {
    271 
    +    Services.prefs.removeObserver("intl.accept_languages", this);
    267 272 
         switch (Services.prefs.getIntPref(kPrefSpoofEnglish)) {
    268 273 
           case 0: // will prompt
    269 274 
           // This should only happen when turning privacy.resistFingerprinting off.
    ... ... @@ -282,6 +287,8 @@ class _RFPHelper {
    282 287 
           case 2: // spoof
    283 288 
             Services.prefs.setCharPref("intl.accept_languages", "en-US, en");
    284 289 
             Services.prefs.setBoolPref("_javascript_.use_us_english_locale", true);
    290 
    +        // Ensure spoofing works if preferences are set out of order
    291 
    +        Services.prefs.addObserver("intl.accept_languages", this);
    285 292 
             break;
    286 293 
           default:
    287 294 
             break;

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