Firefox hangs

It happened to me that firefox won't shutdown. Also, when I choose to start new instance of firefox it fails.

I found that problem was in skype's addon for firefox . I uninstalled it (in firefox: Tools => Addon=> Extension) and everything works OK now.

Firefox, Redirect Loop and Google Calendar

If you have trouble to open google calendar using firefox maybe this can helps:

1. Tools->Options->Privacy->Accept Cookies
2. Tools->Options->Privacy->Clear Now-> (check cookies) -> Clear private data
3. Restart firefox