What add-ons were disabled? Are there any messages in the Add-ons Manager?

All the legacy add-ons, which are supposed to work in ver52.

Woh slow down bro there just extentions... type "about:support" in the url bar then click "refesh firefox" on the top right. If you're that mad at the extention developer you should contact him to see if he is going to update his extention, this isn't a surprise or anything, the creators were givin ~2 year warning this was coming....

Can you answer my last question?

Did you make sure these extensions are compatible with Firefox 52? If you have updated to Firefox 57 (or 56) then extensions might have updated to a version that isn't compatible with Firefox 52.

You can delete the extensions.json file (and possibly other extensions files and addons.json, but not the extensions folder) to reset the extensions registry to see if that has effect.

You can use the button on the "Help -> Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page.

• Help -> Troubleshooting Information -> Profile Directory:
  Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder
• http://kb.mozillazine.org/Profile_folder_-_Firefox