Great addon, I don´t understand the negative reviews.
It allows me to copypasta most streams I´m interested in, being to play them inside my favorite media player, instead of Firefox, thus maximizing my screen state on a split screen.
My main issue is that it doesn´t have an option to send the copied stream to my favorite media player (unlike other addons), making the process a bit too cumbersome.
With that implementation, pretty much close to perfect.
Thanks!