I was automatically updated on November 13th. Then I had problems. I could not access my Bookmarks, and I have many after 3 years. Then the web page would turn blank and could not be closed. I thought it was something wrong with my computer. Then I went to the Firefox web site and read that the aforementioned update had bugs in it. After trying in vain to follow the advice of [Frank] - the web page would not load - I went to Firefox site and was searching for Firefox 2.0.0.17. But was being recommended to download the 3.04 update. I did so with trepidation.
All my problems were GONE. My Bookmarks returned. Web pages no longer froze - such that only turning off was an option.
The loading time was quicker. So I joined the QMO straight away so that I could pass on the good news.
MANUALLY DOWNLOAD Firefox 3.04 and all your bugs will DISAPPEAR !