Comment 24 for bug 289365

I ran into the same problem after auto-updating Firefox to 3.0.6 earlier today. The annoying message kept reappearing no matter how often I restarted Firefox and/or closed the pop-up. It kept coming up even after I restarted my machine and across two different user accounts.

I found a workaround (i.e. reinstall Firefox) here:

http://blog.emobilez.com/2008/12/26/how-to-remove-your-browser-has-been-updated-and-needs-to-be-restarted/

This did the trick for me. Nonetheless the the most recent Firefox build for Ubuntu needs to be fixed. Plus, the current issue is slightly different from the one that was reported here in the first place, so a new bug report may be a good idea.