Firefox 157 Will Include JPEG XL By Default On All Platforms (phoronix.com)
(Thursday August 27, 2026 @11:00AM (BeauHD)
from the what-to-expect dept.)
Mozilla [1]plans to enable JPEG XL decoding by default in Firefox 157 , which is due at the end of September. Phoronix reports:
> Firefox Nightly has JPEG-XL support enabled by default right now to help in vetting this support while Mozilla believes the support is in good enough shape for [2]a stable debut with Firefox 157. This follows Chrome [3]shipping JPEG-XL and Google Research developing jxl-rs as a Rust-based JPEG-XL image decoder that is both performant and secure.
>
> In today's [4]Mozilla Hacks blog post they elaborate on JPEG-XL vs. AVIF image formats: "JPEG XL: Excels at lossless imagery, progressive rendering, and further compressing JPEGs without quality loss. AVIF: Excels at web-quality photographic images, and images that have a mix of sharp edges and flat surfaces. ... Although AVIF tends to produce smaller files at web-quality than JPEG XL, AVIF only has basic progressive rendering support. So, for very large images, it may be worth taking the filesize hit with JPEG XL."
[1] https://www.phoronix.com/news/Firefox-JPEG-XL-2026-Plans
[2] https://groups.google.com/a/mozilla.org/g/dev-platform/c/3YMV4MS34KA?pli=1
[3] https://slashdot.org/story/26/01/13/2026229/jpeg-xl-image-support-returns-to-latest-chromechromium-code
[4] https://hacks.mozilla.org/2026/08/intent-to-ship-jpeg-xl/
> Firefox Nightly has JPEG-XL support enabled by default right now to help in vetting this support while Mozilla believes the support is in good enough shape for [2]a stable debut with Firefox 157. This follows Chrome [3]shipping JPEG-XL and Google Research developing jxl-rs as a Rust-based JPEG-XL image decoder that is both performant and secure.
>
> In today's [4]Mozilla Hacks blog post they elaborate on JPEG-XL vs. AVIF image formats: "JPEG XL: Excels at lossless imagery, progressive rendering, and further compressing JPEGs without quality loss. AVIF: Excels at web-quality photographic images, and images that have a mix of sharp edges and flat surfaces. ... Although AVIF tends to produce smaller files at web-quality than JPEG XL, AVIF only has basic progressive rendering support. So, for very large images, it may be worth taking the filesize hit with JPEG XL."
[1] https://www.phoronix.com/news/Firefox-JPEG-XL-2026-Plans
[2] https://groups.google.com/a/mozilla.org/g/dev-platform/c/3YMV4MS34KA?pli=1
[3] https://slashdot.org/story/26/01/13/2026229/jpeg-xl-image-support-returns-to-latest-chromechromium-code
[4] https://hacks.mozilla.org/2026/08/intent-to-ship-jpeg-xl/