No one can know what happened since no one can know which addons your referring to here? Addons should they not be updated to work with latest firefox they would be disabled from working.

Okay, gee let me start over from the beginning. I just started using Firefox for the first time when version 57 came out and so many media outlets said wow, Firefox doesn't suck anymore and might be as good as Chrome. So, I installed Todoist, Hangouts, LastPass, all new plugins, nothing legacy. I have searched forums and wikis and tried several different ways of updating and repairing and nothing works. It is clear that Mozilla, and Firefox are clearly not as good as Chrome. I have used it for years and never had the trouble I have with this garbage in just a few months. Where is the fix it button. I just want to reset and start over. But, you can't do that with firefox. What a joke. And those who want to help clearly don't. I don't know why I even bothered.

Same here. 64 removes the add-on icons from the toolbar and there is no way to find or use them. Reverting to 63 brings them back. 64 is BROKEN

Others with a similar issue:

https://support.mozilla.org/en-US/forums/support-forum-contributors/713335 Users problem: update to v64 loses add-ons

I created a Bug Report 1523179 Chrome import works, Chrome beta import does not work

Possible Solution; https://support.mozilla.org/en-US/questions/1247876#answer-1191622 Turns out Chrome beta isn't supported, had to install the original Chrome and then it recognized it.