Firefox 1.0.6 is a stability update. We recommend that users upgrade to this latest version. What's new in Firefox 1.0.6: Improvements to API stability for extensions and web applications Download it here.
I didn't want to download 1.0.5 since I heard it made some extensions malfunction. 1.0.6 should be good now.
it seemed to fix my problem, simple pages before would download really slow, and my dad has gigabit DSL