Please support HEVC (H.265) decoding in Windows 11 (22H2 and later).
Windows 11 (22H2 and later) has built-in HEVC support.
However I installed Firefox 122 in Windows 11 22H2, GPU card is NVIDIA GTX 1650, I opened about:support in Firefox, it displays "HEVC is not supported". I confirmed that NVIDIA GTX 1650 is support HEVC hardware decoding.
There are some videos that support hevc encoding, but it is said that Firefox does not support it at the moment, resulting in lag in video playback, it is recommended to support hevc/h.265 as soon as possible
Thank you for your patience on this. I want to share a head's up on HEVC support on Firefox. The short answer? It's in the works.
The long answer? We are building two lines of HEVC support: (1) HEVC for copyrighted TV shows and films on your favorite streaming platforms (such as Netflix, Amazon Prime Video, Disney+, etc.), and (2) HEVC for generic, uncopyrighted video. As of now, we're prioritizing the first line.
At the moment, our plan is to ship this streaming platform line of HEVC as part of our new media pipeline later this half. However, if you'd like to try it out, the support is currently available in our early Beta 129 channel!
Generic HEVC video support is available, but only on our Nightly channel - we will revisit bringing this to our Beta and Release channels once we ship our new pipeline.