Each time I restart the browser (Firefox v124) the extension stops working. It's not even in the Extensions button on the toolbar. I have to go to the add-ons manager, disable the extension, and re-enable it again, to get it to work.
Welp, as I was looking for the version in the about dialog, the browser updates to v125 and the issue seem to have resolved itself. I was just about to follow up with screenshots :P
Each time I restart the browser (Firefox v124) the extension stops working. It's not even in the Extensions button on the toolbar. I have to go to the add-ons manager, disable the extension, and re-enable it again, to get it to work.