In November, Mozilla had a record 5 Firefox/Thunderbird releases: Firefox 3.0 Beta 1 is the “most thoroughly tested beta [they’ve] ever shipped”, but it is not for the faint-of-heart. Those who were brave enough to try out the first beta quickly learned about the poor extension compatibility. Many extensions, especially those pertaining to bookmarks, will probably not function to their full potential if at all . Still a lot more work for the developers before the finished Firefox 3 product can be released. Firefox 2.0.0.9 fixed regressions from the 2.0.0.8 release the prior month Firefox 2.0.0.10 a planned security update…