Firefox 83

Mozilla has issued Firefox 83 with significant updates to the SpiderMonkey JavaScript engine, which improves page load performance by up to 15% and page responsiveness by up to 12% while reducing memory usage by up to 8%. The release also now enables Macs with trackpads to (finally) support the pinch-to-zoom gesture to zoom in and out of Web pages, uses less power when restoring a session with minimized windows in macOS, and supports keyboard shortcuts for fast-forwarding and rewinding picture-in-picture videos. Firefox 83 will also run on M1-based Macs, supporting emulation under Apple’s Rosetta 2 that ships with macOS 11 Big Sur—Mozilla is working on a native release for M1-based Macs. (Free, 73 MB, release notes, macOS 10.12+)