[pseudalopex]

I think performance matters to more people than full range video.

[fireattack]

Performance isn't the only thing people care when choosing a browser. If it is, they probably abandoned Fx for a Blink based browser long time ago. Also does Firefox really have significant performance issue after 57?

[pseudalopex]

Who said it was the only thing?

Blink based browsers aren't faster across the board. They would be without Firefox developers working on performance.