As a long time Opera user I finally changed to FireFox. 2.0.04! The speed is not very pretty and the settings you have under Tools – Options are really skinny. Did you ever try to type into a new tab “about:config“. You can change some of these “config” entries to speed up your browsers performance:
First of all I recommend you to make a backup of the existing configuration. In Vista you will find the profile file under “C:\Users\<USERNAME>\AppData\Local\Mozilla\Firefox\Profiles\<PROFILE.ID>.default” Simply copy this folder to a different location so that you can restore it in case something goes wrong.
Within this tons of settings I found some really useful! Changes in the config are active immediately.