Too much harddisk grinding noises with Firefox
In my experience over the past couple of years, Firefox almost never crashes; and on the very rare occasion when it does, it's no big deal. It is a big deal to me, on the other hand, that it frequently makes a lot of annoying noises on the harddisk. Partially those noises are for maintaining a written record of current state so the state could be re-created after a crash. I would much prefer the peace and quiet. Firefox 3.6 is noisier than Firefox 2.0.
The very frequent writes to the profile database and consequent noise, with no disablement option, is the biggest defect of the program. What's coming in version 4.0 is stuff that I either don't want or couldn't care less about.