You may want to avoid any browser from 2010 and beyond as today's writes count on 4GB machines, 64 bit OSes and more to push up the speed for their apps. You are sitting on a 10 year old (actually it's much older than that) so you must guard against the latest craziest softwares and be ready to roll your system back to when you liked it best.
There is no sign this trend will abate.
Ever since I loaded MS-IE-8, I have found that '2' copies of IE open in Task Manager... I run a DELL-D800 (yes 7yrs old) w/ XP-sp3 and 1Gig RAM.
With IE open twice - it is using upto .8Gig of RAM (not acceptable).
Today (2010/04/02)I tried Google Chrome instead of IE - the first time it opened with only one copy in TskMgr - the second time it too now has 2 copies open...
It went from blazing fast to as slow or slower than IE... And all the problems with IE are now returning with Chrome...
What is causing this? Virus? Bug? Normal process?