Firefox 150

Mozilla has reached its sesquicentennial release with Firefox 150, providing a couple of handy improvements and bug fixes for the Web browser. The update improves Split View, enabling you to Control-click any link and choose Open Link in Split View to open it alongside your current tab. Version 150 also enables you to share multiple tabs in a single step (including both the page title and URL); updates the built-in PDF editor to reorder, copy, paste, delete, and export pages in a PDF; requires websites to request your permission before connecting to devices on your local network; and resolves an issue on macOS where emoji characters are not displayed in Web content when macOS Lockdown mode is enabled. Notably, it also includes fixes for 271 vulnerabilities identified using Claude Mythos (see “What Anthropic’s Mythos and Project Glasswing Mean for Your Apple Devices,” 9 April 2026). (Free, 151.4 MB, release notes, macOS 10.15+)