I was on my way to write an extension like this myself. You saved me some work. :)

Works as it's supposed to.

Works flawlessly

MUCHAS GRACIAS !!!

Works great

Very much helpfull

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Vegre, lekapcsolt kepernyovel is szol a youtube :p

It good. It helps browse other sites while listening to vocals of video on a website.

a working workaround for the dead OGYouTube

Excelente addon, por eso prefiero Firefox en Android que chrome, puedo reproducir YouTube en segundo plano

Awesome, it works greatly and perfectly.