Got it DavidR!
I was referring to Uninstall of the avast add-on, not FF. Anyhow, the FF Update came in when I selected About FF. Then I Enabled Avast Online Security add-on, restarted and all is good.
I think this had something to do with Sync. I just installed FF on new install, and synced. That carried avast over and perhaps it did not carry over well especially since the new version came out.
Thanks guys, I am now running avast again and hope it works out for me. I did have an issue three times now. I keep forgetting that Chrome is forced upon me in the last three installs I'd done, two for a friend and one mine here. The problem being, I needed 64bit and the default is 32ibt. In the future what should I do about that? Is there a choice that I missed?