I've been getting really pissed off lately at how much memory Firefox is using up. I decided to give Opera a try. I opened up the exact same tabs in Opera (about 10 of them) and I got about the same memory consumption. I disabled all the Firefox extensions except for the del.icio.us one (because last time I disabled it and re-enabled it, it totally screwed up the bookmarks menu, and I had to create a new profile from scratch to get it back to normal).
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 9152 david 15 0 214m 105m 19m S 1.7 10.4 0:24.86 opera 9057 david 15 0 211m 100m 24m R 3.7 9.9 0:32.72 firefox-bin
This is a big improvement for Firefox by the way, after disabling the extensions. One of the extensions much be leaking memory big time because the memory usage usually climbs to 250MB. Looks like I will have to go and buy some more RAM. I only have 1 Gig right now. with tw 512MB modules. Looks like there is a third slot. Maybe a new 1G module then.