Link.

Now, what makes this worse is that the man who some how managed to apparently take 5hrs to sort out a problem he probably created (I'd imagine he installed a theme not certified for 1.0PR, there are only a few for 1.0PR and I've tried them all!) is a "Software Developer", so, "Doug Johnson", you sir, are an idiot!Firefox seems like a decent browser, but I had a heck of a time getting it up and running without crashing. I think I probably spent 4-5 hours on it before it finally worked right.
The problem arose from installing one of the themes from the Mozilla web site. Once it was installed, Firefox would no longer run, even after uninstalling and reinstalling. I had to search my hard drive and the Internet multiple times to figure out where the file was that needed to be deleted. It was a mess.
Though it is touted as being more secure than IE, there was also several news stories detailing several security holes in earlier versions. More secure than IE? Probably. But not 100% secure. If you use Firefox, you may be getting a false sense of security.
I can see why it is still in Beta. It does seem fast, and highly compatible with most web sites. And I like the extensibility of it. But for me it has not been reliable enough to make it my primary browser.