tl;dr: Chrome 155 will ship JPEG XL decoding support, reversing its earlier 2022 removal of the format following sustained developer demand via the Interop Project. The decoder is a new pure-Rust implementation (jxl-rs) built for memory safety, using a new SIMD abstraction layer to match the performance of the C++ reference library. Google recommends testing both AVIF and JPEG XL, with JXL being particularly suited for high-fidelity/lossless photographic compression and progressive decoding.