Firefox update failure

[Dorsetmike]

Downloaded the latest Firefox update a couple of days ago and it fails to complete installation,  and gives the failure message each time I restart and implying that another copy of Firefox is running.

Not too worried, it still works OK, just annoying though.

[austinbob]

Might be worth uninstalling it as per Mozilla instructions and then reinstalling.
https://support.mozilla.org/en-US/kb/uninstall-firefox-from-your-computer
Good luck