https://bugzilla.mozilla.org/show_bug.cgi?id=1999324

Index: toolkit/system/gnome/nsAlertsIconListener.cpp
--- toolkit/system/gnome/nsAlertsIconListener.cpp.orig
+++ toolkit/system/gnome/nsAlertsIconListener.cpp
@@ -114,7 +114,7 @@ nsAlertsIconListener::nsAlertsIconListener(
       mBackend(aBackend),
       mAlertNotification(aAlertNotification) {
   if (!libNotifyHandle && !libNotifyNotAvail) {
-    libNotifyHandle = dlopen("libnotify.so.4", RTLD_LAZY);
+    libNotifyHandle = dlopen("libnotify.so", RTLD_LAZY);
     if (!libNotifyHandle) {
       libNotifyHandle = dlopen("libnotify.so.1", RTLD_LAZY);
       if (!libNotifyHandle) {
