It seems a uninstall, then reinstall of 5, restored the browser. However, 6 automagically updated itself again, never letting me opt (I use birdiesync which is not compatible with 6).

Now 6 works but I did not want it, since I cannot sync my droid with thunderbird anymore (birdiesync is a 40 buck app)

How the hell can I STOP 6 from installing itself?

update 8/22 6 starting crashing all over again, it was stable for about a day.

update 8/23 go to tool, options, advancep, update tab, then uncheck the firefox option, then ok close the browser, restart I think this MAY prevent 6 from automagically updating itself in place of 5

HEY MOZ PEOPLE - TRY TESTING, THIS UPDATE IS USELESS

omg... it did the same thing to me! I opened up the browser one time and it reinstalled itself wiping all of my saved bookmarks and favorites! WTH

You need to check your settings. If you do as I describe above, before unchecking the firefox option: select Ask me what I want to do Select Warn me if this will disable any of my add-ons Then unselect firefox, the other options will grey out, but behave as desired.

Close firefox Reboot This will force firefox to ask you before it can update.

cgman, you need to set: options>Privacy, remember history

If you use software recovery tools, you can likely get the files back. Heck google where they live in your system, odds are they are still there, renamed

Just happened to me, Firefox 6 autoupdated even if explicitly told not to via Preferences...

Firefox 6 ignores prevent update settings | Firefox Support Forum | Firefox Help - https://support.mozilla.com/en-US/questions/886499

Ugh...