I see the remainder of my questions was never posted... Continues... I tried rolling back by attempting to install the older version but that also did not work.

1. HELP PLEASE

I am a bit of a noob and don't like "figiting" with stuff so when the Google resources say do this and that, but the menu item labels on my application varies from that of the Google instructions - I fall out of the bus. I do have an 'old Firefox data' folder on my desktop but how do I

1. In plain English

Get all my Add-ons / Plugins / Extentions on Mac OS back?

You can recover data from the folder on your Desktop but you will have to reinstall add-ons (including extensions). Plug-ins should be present in your new installation (see that tab in Add-ons and Themes in the 3 bar menu or Tools menu on the menu bar). Someone could reply with a way of adding extensions from the old data but you may prefer not to wait indefinitely.

https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data#w_what-information-is-stored-in-my-profile https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile