Sometimes when im surfing on internet firefox just stop to working properly and dont open any website or domain or anything, just can access to internet, but is not a ISP failure because i can keep chatting, skype, irc, and also navigating using internet explorer or opera, the point is just firefox stop all kind of activities with internet looks like if im not connected. To solve this i close the firefox and try to open again. When this happen i get a message saying firefox.exe is already running, then i just open task manager and try to close but doesnt matter how hard or how many times i click to close, the firefox.exe process just cannot be closed and my only solution for this is restarting the pc. There are any way beyond task manager to force the shutdown of firefox.exe? Or maybe any alternate program to force a shutdown of firefox.exe??