Call me "Crazy" after 2-3 hours and a reboot I finally installed FireGesture ext. in FF 3.0.1 normally. What is going on on my pc is a mystery, it looks a bit as virus infected yet AVAST detected nothing so far. To be continued...anyway
Uninstall ThreatFire and everything will work
I would have to support that suggestion, you really do have too much of a good thing on your system.
Threatfire and Comodo with defence plus could get tangled up. There have been several posts on the forum where threatfire has been involved in similar issues with extensions, I don't know if that is also related to comodo or just threatfire and some firefox extensions.