moox the creater of firefox optomized has done it again and created a FASTER optomized build this time with the mmx instruction set which makes these builds A LOT faster than the default builds and a bit faster than his optomized builds.
You can pick up the ff 0.9.1 release here
although we are getting a 0.9.3 release soon because of a certificate spoof vulnerabliity 
by firefox 1.0 we will have auto updates so that will be nice :D.