Neat addon that could be very useful. Unfortunately, since I set dom.event.clipboardevents.enabled to false, the addon won't work for me, and I'm not going to enable that just for this. It would be great if it could be made to work without requiring that. One piece of advice for the author: have it check the status of that setting and warn if it's disabled. I spent a few minutes trying to get it working and was about to leave a 1-star review thinking it wasn't doing anything.