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-rw-r--r--modules/libpref/init/all.js2
1 files changed, 2 insertions, 0 deletions
diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index 110f4384f..59f8de9ac 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -4738,6 +4738,8 @@ pref("dom.webnotifications.requireinteraction.enabled", false);
// Alert animation effect, name is disableSlidingEffect for backwards-compat.
pref("alerts.disableSlidingEffect", false);
+// The immediate duration of the alert, in milliseconds.
+pref("alerts.durationImmediate", 20000);
// Show favicons in web notifications.
pref("alerts.showFavicons", false);