Is there a way for Firefox to notify me when the add-on was updated (ideally with the list of changed things)? Currently everything is so hidden that the only way to check if the addon was updated is to check it’s version… and remember previous version. Or at least display add-on version and update date in the list of the add-ons…
You can select “View Recent Updates” in the gear in the top right to see a list of recently updated extensions, including when they were updated and the changelogs the developers provided.
Only the updated extension itself could notify you directly, Firefox has no built-in way to always tell you.