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-rw-r--r--modules/libpref/init/all.js3
1 files changed, 3 insertions, 0 deletions
diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index 38c3ced91..b31ae8e33 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -1331,6 +1331,9 @@ pref("image.animation_mode", "normal");
// Same-origin policy for file URIs, "false" is traditional
pref("security.fileuri.strict_origin_policy", true);
+// Treat all file URIs as having a unique origin.
+pref("security.fileuri.unique_origin", true);
+
// If this pref is true, prefs in the logging.config branch will be cleared on
// startup. This is done so that setting a log-file and log-modules at runtime
// doesn't persist across restarts leading to huge logfile and low disk space.