I never liked auto updates for anything, and always had them set for manual when possible. MS made it nearly impossible to run that way -- I'd get near daily "Updates are Ready, Install Now or Wait (1 hour)" type messages -- eventually I caved in on the Windows automatic updates.
I still don't let browsers update automatically -- and I think it's with good reasons. How many times does a release need a "security update" 24-48 hours later because the NEW version introduced an exploitable bug?
I prefer to live on the rusty edge of technology -- give the software a year or so to age and mellow.
I think a lot of "updates" and "upgrades" are driven by marketing departments so they can say, "Look! New! Different! Improved!"... and all they did was rearrange the menus -- but it gets them some press.
I liked FF 3.6.24... it allowed me to skip several versions I never missed. I only upgraded because for some reason Adsense control panel no longer properly displayed under it. Now I have 4-5 new issues to deal with on the browser side -- and after a week, I'm already a version behind "the bleeding edge".