Rated 5 out of 5 stars

Hey,
I tried to get the addon working with the version I was using (beta: 58.0b2) but just couldn't. So in order to find out if it was me or the addon, I decided to test it on another computer, with the stable version 52.5.0 installed. And, well it immediately worked...
Thus I came to the conclusion that the addon does not work with the beta version of firefox. Can anyone confirm that?

I still give it five stars since it worked for so long and it was always one of the first things I installed, when I set-up a new computer.