So far, I like this add-on, but I have not looked at its security. I am confused as to why this add-on is classified as experimental, why there are only a handful of users, how this add-on relates to the 'archive.today Button' addon which I have installed in some Firefox profiles, and why the release date is different, but the version number is the same, as for the archive.today button. This makes me wary of the integrity of the add-on, but generally speaking, this add-on has important functionality, which needs to be available. I think Mozilla should include this add-on in their security review, and probably remove the "Experimental" status, but instead, make it a recommended add-on if it passes the security test.