I almost gave up on Firefox.

After installing the latest version 3.5.Blech a few weeks ago, a version which was supposed to be faster, more stable, more everything, I gave up.

After the browser kept freezing, and freezing everything else on my computer I downgraded back to the stable 3.0.14 version, and everything is once again fine.

The lesson is don't rush to upgrade what isn't broken.