Firefox adopts Rust zlib-rs for gzip, boosting safety and speed
Firefox 151 now uses the Rust‑written zlib‑rs for gzip compression, swapping out the legacy C library. The switch delivers faster, memory‑safe decompression and required a few symbol‑prefix tweaks and a quick fix for an Intel Raptor Lake CPU bug that surfaced after deployment. This marks a key milestone for Rust in core browser code.