Bug 1875313 - Use en-US as a fallback when spoof English is enabled i…

…n ICUUtils. r=timhuang,tjr Differential Revision: https://phabricator.services.mozilla.com/D198967
dothq · Jan 31, 2024 · 69ffaa7 · 69ffaa7
1 parent dc04614
commit 69ffaa7
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/intl/unicharutil/util/ICUUtils.cpp b/intl/unicharutil/util/ICUUtils.cpp
@@ -41,7 +41,10 @@ already_AddRefed<nsAtom> ICUUtils::LanguageTagIterForContent::GetNext() {
 
   if (mCurrentFallbackIndex < 2) {
     mCurrentFallbackIndex = 2;
-    // Else take the app's locale:
+    // Else take the app's locale (or en-US, if spoof English applies):
+    if (mContent->OwnerDoc()->ShouldResistFingerprinting(RFPTarget::JSLocale)) {
+      return NS_Atomize("en-US");
+    }
     nsAutoCString appLocale;
     LocaleService::GetInstance()->GetAppLocaleAsBCP47(appLocale);
     return NS_Atomize(appLocale);