Some issues Rated 4 out of 5 stars

Great FF add-on!
Needed to restart in first use;
In Youtube, sometimes it plays only sound, so it needs to reload the page 3 times to start video+sound;
Another times we can't see any video from YT, because the screen keeps dark and we need to see in another browser.

This review is for a previous version of the add-on (0.1.0.1-signed).