Firefox buggy during request

I am experiencing real buggyness in firefox 3.6.3. Sometimes when I click on any button e.g. this form (submit new thread), I get no response whatsoever. It lacks that responsive feel.

Might I mention that it happened some of the time. Its probably not because of the ISP because I didn’t have any problem before when I was using Vista. Maybe it was because I meddled with things like this and tweaking some stuff in the about:config.

I’m out of ideas.

What is wrong here? Please help me.

Box: openSUSE 11.2 | GNOME 2.28.2 | Acer RS740DVF | AMD64 X2 5600+ | Radeon HD4670 | 3GB RAM

Does this occur with other browser as well? Have you tried a new FF-profile yet?

Yes, it definitely happened in other browsers e.g. when I used Chrome.

What about this?