Firefox 147 adds WebGPU support on Apple Silicon and enhanced security features.

Released January 13, 2026, Firefox 147 expands WebGPU support to Apple Silicon Macs and adds zero-copy hardware-decoded video plus a range of cross-platform fixes and developer features.

Mozilla released Firefox 147 on January 13, 2026, with a set of performance, compatibility, and security updates across platforms. The release expands WebGPU support to all Apple Silicon Macs and improves video playback through zero-copy hardware-decoded video, among other changes. Linux-specific work includes XDG Base Directory compliance and fixes for fractional scaling on GNOME with Mutter. Developer-facing additions and security migrations are included alongside experimental user-facing features. Notable changes: - WebGPU support expanded to all Apple Silicon Macs to broaden graphics API availability on macOS. - Zero-copy hardware-decoded video added, aimed at reduced memory use and smoother playback, notably on systems with AMD GPUs and on Windows and Linux. - Support for the Freedesktop.org XDG Base Directory Specification on Linux and rendering fixes for fractional scaling with the Mutter window manager. - Developer and security updates including Compression Dictionaries (IETF RFC 9842) support and migration to Safe Browsing V5. - Experimental customizable keyboard shortcuts and refinements to picture-in-picture behavior when switching tabs. Summary: Firefox 147 combines cross-platform performance improvements, developer features, and security updates to address long-standing issues and modernize platform integration. Mozilla reports early uptake and Linux interest, and the release notes indicate planned refinements in upcoming point releases for experimental features. Undetermined at this time.