Supports some handful websites only.
Please add support for majority of the websites.
Thanks

Please let extension work also with webm videos...it is so useful with external players such as MXPlayer in order to use 3d acceleration and have a better streaming experience!

Great tool for adding playback capability that is lacking for Firefox Quantum, on certain sites. Unfortunately, there's no ability to select the quality of video being presented, when there are multiple bitrate options-- but at least I don't have to switch browsers anymore!