Webware has a good story on two quick fixes for Firefox 3. While I've found the new version of the browser to be an excellent upgrade, I did have both of the problems described in the Webware post, and both of the fixes worked well for me. The first problem involves glitches in playing Flash files. A simple upgrade to the Flash 10 beta is indeed a fix. The second problem, which I suspect many people are having, regards incompatibilities with some Firefox extensions and the new version 3 browser. As Webware prescribes, MR Tech Toolkit and Nightly Tester Tools are workarounds. Check out Webware's complete discussion.