The likely reason you are seeing that notification is because you need to update to Firefox 63.0.1, which has some important fixes. Please update and the arrow should go away!

Thanks Amal for asking the question

& to Tyler Downer for the reply

So, if we update to Firefox 63.0.1,....will this stop future update notifications?...& more importantly, will we once again have the option to check manually, and update manually without the ‘update available’ pop-up notifications?

@firefoxlady It has solved the issue for the time being. But no change to "update manually". I read this issue in more detail: https://bugzilla.mozilla.org/show_bug.cgi?id=1420514

I believe even Chrome forces updates now, so FF team feels its necessary and will keep users safe. Not sure if its a good idea though. Maybe they can allow users to do it automatically once a month or so, i.e. allow users provision to decide which dates or timing etc.

Thanks Amal updates often have problems or they wouldn't need fixes!

"...when there is a problem with a Firefox update, people look for a way to go back to the previous version" I hope that I don’t have to revert to an older version of Firefox (like 62.0.3) as the only temp solution for now!

You should always stay on the latest version, applying updates will make that green arrow go away.

I, too, strongly object to the removal of the feature to never update without any reminder prompts. The need arises for those of us who have non-administrator user accounts that purposely are not permitted to do updates. And it is big nuisance for me because I tend to run multiple instances of FF instead of opening multiple tabs in one instance.

If there is no GUI method for disabling this nuisance, is there something we can do in the Registry? Or some parameter in about:config that would "delay" the prompt for "eternity", if not disable it altogether?

I have already disabled the Mozilla Maint Srvc in msconfig, to no avail.

I am still using v 54 because I refuse to lose my add-ons.