I forgot to add these lines on post, so here they are: When I clicked on the Restart Firefox button, nothing happens or it will not relaunch Firefox. This also applies for the Quit Firefox program.

I usually click the close X to close the window and not one of the restart and quit buttons. ---- If you have submitted crash reports, please post the IDs of one or more recent crash reports that start with "bp-". *bp-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx You can find the report ID of recent crash reports on the "Help -> More Troubleshooting Information" (about:support) page. *click the "All Crash Reports" button on this page to open the <b>about:crashes</b> page and see all crash reports. Alternately, you can open about:crashes via the location/address bar. See also: *https://support.mozilla.org/en-US/kb/mozillacrashreporter *https://support.mozilla.org/en-US/kb/troubleshoot-firefox-crashes-closing-or-quitting *https://support.mozilla.org/en-US/kb/firefox-crashes-asking-support