mozilla firefox not responding then bookmarks open

I just got a new laptop, and the amount of things that get shipped totally broken is just crazy. Please get this problem fixed before the final release of Firefox 3.0.I've spent the last 3 days angrily submitting bug ticket after bug ticket, including one for Firefox. These computers were all running Windows XP SP2 or SP3. Is there why this problem occurs? I tested it on seven computers (six using RC1 and one using both RCs), and they all had problems at least four times a day. The problem is that restarting computers half a dozen times or so a day isn't very fun, and I'm afraid they will go back to their previous Internet browser. They will, however, understand the 'restart your system' part of the message and will most likely restart their computers. The message states that the user should 'close the existing Firefox process,' something that people who are not computer-savvy will not understand. My concern is that if this is a widespread problem, people who do not know how to fix it will not continue with Firefox.

I taught him how to fix it via Windows Task Manager, and now he's using Firefox again. I asked him why he had switched, and he told me about this problem. I was surprised, as he's been using Firefox 2.x exclusively since I installed it for him over a year ago. However, I installed RC1 on a friend's computer when it first came out, and he told me several days ago that he no longer uses Firefox and has gone back to Internet Explorer. I did not think much of it, as it was simple enough to fix: I go to Windows Task Manager, click on the Processes tab, then end Firefox.exe. The message sometimes comes up when I have closed Firefox and am reopening the application. I updated my Firefox to 3.0 RC2 and am still having the same problem, which I have never once had with Firefox 2. To open a new window, you must first close the existing Firefox process, or restart your system.' 'Firefox is already running, but is not responding.

Ever since I upgraded to Firefox 3.0 RC1 from Firefox 2.x, I have been having the following message at least several times daily:

Mozilla firefox not responding then bookmarks open