HDR support for Windows

[LinDen]

Firefox managed to bring HDR to Macs in 100.0 version. Now it's time for Windows!

It'd be awesome to watch and work on HDR images and videos using Firefox in 2022. Windows is the most popular OS, why not bring HDR here too?
More monitors and devices running on Windows support HDR, so there is an increase in demand of HDR support in Firefox.

The only option for Windows users is either to switch to another browser or to download and use a dedicated app from Microsoft Store.

[Arokhantos]

Which hardware ?

[ahale]

Previously in 152 you had to set a pref (gfx.color_management.hdr) to enable HDR video, and it worked only on certain hardware (most AMD, some very recent NVIDIA, nothing on Intel).

Firefox 153 beta (and 154 nightly) should provide HDR video with all GPUs, and without needing to enable a pref.