browsers

Mozilla's Firefox 157 brings the Nova visual refresh, a returning compact mode, hardware AV1 decoding in WebRTC, and new CSS support for at-rule() and overscroll-behavior: chain.

Mozilla released Firefox 156 on September 15, 2026, with scheduler and Promise.try fixes, TLS group removals, a roughly 45% faster PDF viewer startup and new enterprise policies.

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.

Safari 27.0 folds its Safari MCP developer server into a stable release, adds CSS-styleable select dropdowns, and rewrites the module loader in native C++.

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.