Firefox unreliable?

time to read 1 min | 145 words

I'm getting more and more often into situations where Firefox stops responding. It's still "working", which means that the UI is responsive and I can switch between tabs and scroll, but I can't go to new sites or follow a link (or even do a refresh). It just pretend to do it, and does nothing.

Closing it doesn't work, it will close the window, but the process will remain live, so I need to kill via task manager. Only then I can start it up again and it will work. I reinstalled 1.0.7, and it didn't help.

Anyone knows what it can be? I'm not using any special extentions that may cause it (TabBrowser Preferences, All in One Gestures, ColorZilla & WebDeveloper, Google bar) so I don't know what is the reason for this behavior.