Firefox has been pissing me off lately. From time to time, it will get stuck at 99-100% CPU usage and slow everything to a crawl until I exit and restart it, so I tried disabling java and java script in the preferences, but that broke some fairly crucial features on websites. At least I've reduced the amount of RAM it inhales; it used to sit at about 300,000K most of the time, and I got it down to a mere 150,000K by disabling everything except adblock and flashblock and fiddling with some obscure setting in about:config.