Looks like Mozilla's last word on it is that they won't add it: https://bugzilla.mozilla.org/show_bug.cgi?id=1111277 https://bugzilla.mozilla.org/show_bug.cgi

Looks like Mozilla's last word on it is that they won't add it: https://bugzilla.mozilla.org/show_bug.cgi?id=1111277 https://bugzilla.mozilla.org/show_bug.cgi?id=1111277 > Thomas Daede [:TD-Linux] > Comment 13 • 3 years ago > The licensing costs for HEVC makes implementing BPG in Firefox impractical. > In addition, supporting a patent encumbered image format is not in line with Mozilla's goals of promoting the free and open web. > BPG's technical performance is impressive, but a successor to JPEG needs to not regress on the freedom of usage that JPEG offers.