Here’s an interesting test:

Say what you will about Safari and iOS, but it rocks with image format support. HDR JPEG XL and AVIF render correctly, and look like the original HEIF file from the camera.

Helium (a Chrome fork) is on the left, Firefox on the right, running CachyOS Linux with KDE on a TV, HDR enabled from AMD output.

Firefox fails miserably :(

Chrome sorta gets the AVIF right, though it seems to lose some dynamic range with the sun.