So it would seem I'm the second user to install this add-on and the first user to review it. How exciting!

The current behavior when you click the icon is to check whether the page is archived, and if so it sends you to the most recent snapshot. If not, a snapshot is automatically taken of the page. This is pretty foolproof as archive.today already asks if you want to take a new snapshot if a snapshot exists and is older than 5 minutes, so there's no need to include a separate snapshot button.

The one thing I would change is to include an option in the settings to disable automatic submission for snapshots on click, as I can imagine a webdev or some similar case where a page that shouldn't have been uploaded ends up archived accidentally via misclick or whatever.

Keep up the great work John!