Firefox NightlyMay 22
The new JPEG XL image format support was activated today in Firefox Nightly
https://bugzilla.mozilla.org/2040074
2040074 - enable image.jxl.enabled pref on nightly channel only

RESOLVED (tnikkel) in Core - Graphics: ImageLib. Last updated 2026-05-22.

Show threadchrysnMay 25
@firefoxnightly I found no online test cases, does this do progressive loading with cancellation already? Like, Firefox doesn't need all the pixels, so once the first few KiB are in and sufficient for the display, no more is requested?
Show threadFirefox Nightly
@chrysn I'd suggest asking the graphics team in their matrix room https://matrix.to/#/#gfx:mozilla.org
You're invited to talk on Matrix

You're invited to talk on Matrix

May 26 at 2:33pmWeb
Show threadchrysnMay 26
@firefoxnightly Thanks. For closure: It's not so easy because the encoder might have attention on an area, and refine that beyond the resolution before filling visible details in the boring parts.