Press the Alt or F10 key to bring up the toolbar. Then Help > About Firefox will tell you what version have. WARNING: and install any updates.

https://support.mozilla.org/en-US/kb/update-firefox-latest-version

Type about:support<enter> in the address bar. This page contains information about your system and Firefox.

heffalump said

Menu does not give me a "help" option to learn what version I'm running.

When you click on the 3-bar menu, you'll find 'Help' at the bottom, next to a question mark. Click on 'Help' and then on 'Firefox Health Report'.

Or simply follow FredMcD's directions .....

Thanks for quick responses. Worked fine.

heffalump said

Thanks for quick responses. Worked fine.

I'm sure that I speak for Fred as well when I say : " You're welcome  ! "