I've been having this problem for a couple weeks now. Firefox will hang randomly. I've disabled all my addons to narrow it down and even upgraded to FF 5.0.1 but I still have this issue. Firefox hangs while browsing the internet. Sometimes, it happens when I click a bookmark in the toolbar, sometimes it happens when I click a link, and even when I'm just scrolling down a page. It does it on sites with flash and without flash, it doesn't seem to discriminate. Anyway, I love firefox but this is just a killer. It's incredibly frustrating to be in a hurry and have to wait 30 seconds for the it to unfreeze. And..it just did it again as I was typing. Help me!