Firefox has quietly undergone a significant evolution with its latest update, version 150, rolling out across Windows, macOS, and Linux. This isn't about flashy new designs, but a refinement of existing features and a relentless focus on security, making your browsing experience smoother and safer.
The split-screen view, introduced recently, has become remarkably intuitive. Now, a simple right-click on any link allows you to instantly open it in a split view, and rearranging the two panels is effortless. It’s a small change that dramatically improves multitasking.
Firefox’s built-in PDF viewer is rapidly transforming into a full-fledged PDF editor. Beyond simply viewing documents, you can now reorder pages, copy, paste, delete, and even export individual pages. Extracting images from PDFs is also now a seamless process, with the promise of PDF merging on the horizon.
Privacy remains a cornerstone of Firefox’s design, and its local translation feature continues to impress. Beyond translating webpages, you can now translate any text directly within the browser, mirroring functionality found in major search engines, all without sending your data to the cloud.
Enhanced profile management is now available on Windows 10, offering a clear separation between work and personal browsing data, including bookmarks and passwords. Local profile backups are also now supported on both Windows 10 and 11, adding an extra layer of security and peace of mind.
Firefox’s free VPN, launched with version 149, is set to expand with version 151. Users will soon have a choice of server locations – the USA, Canada, Germany, the UK, and France – moving beyond the current single US-based option. The VPN feature is also coming to Firefox for Android, though a specific release date hasn’t been announced.
Under the hood, Firefox 150 addresses a substantial number of security vulnerabilities. Mozilla’s latest Security Advisory details 41 fixes, with roughly a third categorized as high risk. These include critical issues within the JavaScript Engine and HTML renderer, preventing potential exploitation.
A cluster of high-risk memory access errors, identified under CVE numbers CVE-2026-6784, CVE-2026-6785, and CVE-2026-6786, were discovered internally and swiftly addressed. These vulnerabilities also impact Firefox ESR and Thunderbird, highlighting the interconnectedness of Mozilla’s security efforts.
Alongside Firefox 150, updated Extended Support Release (ESR) versions – 140.10.0 and 115.35.0 – are available. These updates ensure continued security for users on older systems, including Windows 7, 8.1, and older macOS versions, with Firefox ESR 115 receiving updates through August 2026.
Mozilla is also preparing updates for Thunderbird, versions 150 and 140.10.0esr, which will incorporate the same security fixes inherited from the Firefox base, ensuring a consistently secure email experience.
