developer.chrome.com

Chrome's documentation dates XSLT's removal from Stable to Chrome 158 on November 17, 2026, outside origin-trial and enterprise-policy exceptions; Edge's notes say Edge 159. A crawl study estimates about 120 broken pages.

Firefox 159, released October 27, 2026, enables scroll-driven animations by default and adds scoped custom element registries, which web.dev lists as Baseline Newly available; legacy masonry syntax is removed.

Chrome's origin trial for the Email Verification API began in Chrome 150 on desktop with Gmail participating; Google's October update lists breaking changes, and InfoQ reports developer criticism.

Google promoted Chrome 157 to stable with 213 security fixes, seven rated critical; SecurityWeek reports no mention of exploitation in the wild.

Chrome 155 entered beta on September 16, 2026 with JPEG XL decoding via a Rust decoder, NIST post-quantum algorithms in WebCrypto, and TC39 text module imports.

Chrome 154 reached stable on September 22 with a frame-sizing property for iframes that size to their content, links and tabs modes for scroll markers, and text-decoration-inset.

Google will remove every remaining Manifest V2 extension from the Chrome Web Store on August 31, 2026, completing a phase-out that has already disabled uBlock Origin and other legacy ad blockers in Chrome.

Microsoft Edge, Mozilla Firefox, and Google Chrome are each cutting their release interval from four weeks to two, starting in late August and September 2026.