FireFox - update needed - how to hide

Hi, Is there a way to get rid of the messages about the upcoming browser update for Firefox on Linux? The message appears at the second launch on a new profile and then at random moments in new tab. Message attached. I tried already whats below, but its not helping: user_pref("app.update.enabled", false); user_pref("app.update.silent", true); user_pref("browser.startup.homepage_override.mstone", "ignore"); user_pref("startup.homepage_welcome_url.additional", "");