Posted 19 April 2017 - 06:58 PM
The default state of Firefox (Tools->Options->Advanced Pane->Update Tab) is "Automatically Install Updates" and Chrome is set up the same way and without any direct way to disable it (and for good reason).
Web browsers should always be updated to their latest versions as a great many improvements in security go along with that and older versions stop getting any updates, including security updates, after some period of time. Right now Firefox is about to roll out version 53 which drops support for Windows XP and Vista and anyone remaining on version 52, even if they're on the ESR (extended service release) version of 52, will only continue receiving security updates for a few months.
Auto update is not the default for no reason.
Brian AKA Bri the Tech Guy (website in my user profile) - Windows 10 Home, 64-Bit, Version 1803, Build 17134
. . . the presumption of innocence, while essential in the legal realm, does not mean the elimination of common sense outside it. The willing suspension of disbelief has its limits, or should.
~ Ruth Marcus, November 10, 2017, in Washington Post article, Bannon is right: It’s no coincidence The Post broke the Moore story