Firefox has been crawling for [me recently. I mostly fixed this today by uninstalling [Google Desktop from my [MacBook.

However I also fired up Opera - boy did it feel fast next to Firefox. I really do like the cross browser sync features of Google Browser Sync which allows me to keep home and office in sync, and things like Web Developer (which is only an occasional use, but invaluable), however Opera is a very nice browser. Its a bit worrying to see all the stuff on pages I normally don’t see - I normally always use AdBlock, but other than that Opera is under strong consideration.