Hello, To stop Firefox push notifications, go to Settings > Privacy & Security > Permissions, click Settings. Go to Notifications, and remove specific websites or all websites. To prevent future requests, check Block new requests asking to allow notifications in the same menu. For specific sites, Click the menu button > Settings > Privacy & Security. Scroll to Permissions, click "Settings... next to Notifications, select the site, and click "Remove Website". To disable update notifications, type about:config in the address bar, search for app.update.auto, and set it to false. Hope it helps :)