How many add-ons, and what were they?

In some cases, it is easiest to "resurrect" your old profile and use that for reference, since you then can see your old Add-ons page, or use the support information page to cross-reference between the friendly names of the extensions and the unique ID for their file/folder (if you plan to copy by hand).

This post has my suggested procedure to regain access to old settings on Mac: https://support.mozilla.org/questions/1080782#answer-774455

I had a list, I can't remember them all - hence the question...Are they stored somewhere in FF the same way all my other info was saved for the refresh or are they just flat out deleted? They were all carefully researched and chosen so I'd hate to have to do all that work again! Thanks for your help.

Oh, I see your suggestion, thank you, will try that now!

Was able to locate them by browsing the "old FF date" folder that appeared on my desktop after the refresh, but thank you for the excellent link above! Really appreciate your help.