Which firewall do you use?
avast should mess nothing with Firefox...
Are you using ThreatFire? Any other security program?
Thanks
Since a couple of weeks I have been using my routers firewall. Before that it was windows firewall (with same issues)
SpywareBlaster is installed and spybot with the realtime scanner ( I think it is called tea timer) disabled. ThreatFire? I don't even know what it is.
My Firefox version is 3.0
I was using the latest Avast free version.
I did try disabling Firefox plugins like firegesture and Noscript. They had nothing to do with it.