Doesn't seem to do anything. After the tests of run there's no result screen or anything. There's no documentation and the video has no sound. All in all a pretty poor effort and waste of time.
I am sure that I probably missing something obvious, but I could not figure our how to find/run this extension after installing it. I am running Firefox Developer Edition 58.06.13 (64-bit). I am suspicious of this possibly being a comparability thing.
