There is an add-on which I have been using long ago but it is not working for some years. It is a free add-on listed in the mozilla add-on website and is a legacy add-on which uses XUL overlay.
I am a developer and I would like to take over this add-on which seems to be dead for around 3 years. I checked to see if there is a way to contact the add-on author in the add-on site and couldn’t find how. Can someone from the community please guide me?
And what if the author do not respond?