[Bayart]

Playback or rendering ? I know my browser has performance issues because it doesn't have hardware-accelerated playback for VP9, I don't know if FF is in the same basket (sounds like it might be). Having an addon that only enables h264 solves that.

[PlutoIsAPlanet]

Afaik YouTube uses user agent sniffing to use slower functions for Firefox.

[krzyk]

YouTube started using Shadow DOM V0 (which is deprecated) some time ago, which is implemented only in Chrome/Chromium, as a result all other browsers render it slower.

[vezycash]

Google also blocked Windows Phone from Google maps.

https://arstechnica.com/gadgets/2013/01/google-maps-windows-...

[zmonkeyz]

Not to mention pulling the Windows Phone Youtube app that Microsoft wrote because it wasnt made with html5. Nevermind that the android or iphone app didnt support it either.

[mscasts]

They also are still blocking pretty much all browsers except Chrome from Google Hangouts.

[mscasts]

Both but mainly playback.