Firefox tip

Occasionally you may have an issue where Firefox hangs - I mean really hangs. You close the browser. Then you start Firefox again and a little popup window informs you that the profile is in use, blah, blah, blah. Don't try to make a new profile or find the old one. The problem is simple, Firefox is still running.

Do ctrl-alt-del and go to Task List and then Processes. Find firefox.exe and end the process. If there's more than one, end all of them. Now if you open Firefox it should work.