Okay, I've had this problem for a while and I'm beginning to wonder why. Firefox sometimes responds very slowly, especially when rendering Wikipedia and a few other pages (mostly wikis actually). I don't mean connecting to the internet, I mean responding to the user; e.g. I run a mouse gestures extension which can become unusable with a couple of Wikipedia tabs open. Booting the same machine into Windows Me and running Firefox I don't have this problem. System is FC5, Athlon 1.3GHz, 1GB RAM, GeForce 3 Ti200 with Nvidia drivers. So: Does anyone else have this problem? Is this also present in FC6 (I will be upgrading shortly, and won't bother with anything else if that will fix it)? I've seen mention that this is because FC FF is optimised for size, not speed, and various patches slow it down. Does this sound plausible? (I suppose it's easy enough to test by downloading a binary FF from Mozilla) -- imalone