Firefox 157 will include JPEG XL by default on all platforms
- ID
- 17937
- Status
- summarized
- Published
- 26 Aug 2026, 1:55 AM
- Fetched
- 28 Aug 2026, 2:57 AM
- Provider
- Hacker News
- Category
- dev-community
- Original URL
- https://groups.google.com/a/mozilla.org/g/dev-platform/c/3YMV4MS34KA?pli=1
- Source URL
- https://hnrss.org/best
Summary
- Score
- 6.5
- Created
- 28 Aug 2026, 4:01 AM
- Tags
- Audience
- developersvibe_coderssaas-startup-founders
What happened
Firefox 157 will enable JPEG XL (JXL) image decoding by default on all platforms using the Rust-based `jxl-rs` decoder. Safari already shipped JXL in 2023, while Chrome still has it behind a flag with no intent to ship by default yet. Firefox's implementation includes multithreaded decoding, animation, and progressive display, outperforming Safari's C++ libjxl slightly on the author's machine.
Why it matters
Web developers can soon start serving `.jxl` images to Firefox and Safari users to reduce bandwidth and storage costs, as JXL offers better compression than JPEG/PNG. You should evaluate adding JXL to your image pipeline or CDN configuration, keeping in mind Chrome users will still need fallback formats for now.
Discussion angle
How to implement JXL with graceful fallback for Chrome users and measure the actual bandwidth savings versus WebP/AVIF.