I like to keep 2 firefox sessions open with 6 or 8 tabs each, so that all the tabs show in full width. Is there any way to reopen all the tabs in both sessions after closing firefox? Usually only the tabs in the last session closed will be restored, not both. If I restart the computer however, and firefox is forced to close, both sessions will reopen when I launch firefox after rebooting, so there must be a way to make this happen. Since I have upgraded to version 4, it hangs if I leave it inactive for hours, so I would like to know how to force my 2 sessions to close and reopen again.