Firefox 151: Enhanced Privacy, VPN Multi-Location, and Critical Security Fixes
Privacy Boost: VPN Expands and Session Cleanup Gets Easier
Mozilla’s latest browser update, Firefox 151, delivers significant improvements for user privacy across Windows, macOS, Linux, and Android. The free VPN feature introduced in version 149 now offers a choice of virtual locations, giving users more control over their digital footprint. Currently available in the US, Canada, the UK, France, and Germany, these same countries are now selectable as VPN endpoints. To use the service, you need a free Mozilla account, and you’ll receive 50 GB of monthly data allowance. This location selection is being rolled out gradually, so not all users may see it immediately.
Privacy in private browsing also gets a major upgrade. With a single click, you can now clear an entire private session without closing the browser window, starting a fresh private session with no history. Additionally, Firefox 151 strengthens tracking protection. Mozilla reports that improved fingerprinting defenses reduce the number of identifiable users by 14% overall – and by up to 50% on macOS alone.
New Tab and PDF Viewer Enhancements
The revamped New Tab page now offers a wider selection of background images and is engineered to support upcoming features that Mozilla plans to introduce before Firefox 152 arrives on June 16th. For those who work with documents, the built-in PDF viewer/editor gains a practical capability: merging multiple PDF files into a single document. Moreover, the internal translation page (about:translations) is now easily accessible via the menu under “More Tools,” streamlining language support.
Linux users receive a notable addition: local backup of Firefox profiles, with the ability to restore them across different platforms. This feature enhances data portability and disaster recovery options for open-source enthusiasts.
Security Flaws Fixed in Firefox 151
Mozilla’s Security Advisory 2026-46 details over 30 patched vulnerabilities. Of these, 28 were discovered and reported by external security researchers. Mozilla classifies four of those external findings as high risk, including a potential sandbox escape (CVE-2026-8945). Eleven vulnerabilities are rated medium risk, while the remainder are low risk. The advisory also notes three internally discovered issues resulting from programming errors in memory management.
Tip: Keeping your browser updated is essential, but comprehensive protection requires robust antivirus software. Check out our picks for the best antivirus software for Windows and best VPN services to stay ahead of security threats.
Other Browser Updates: ESR Versions
Alongside Firefox 151.0, Mozilla released ESR versions 140.11.0 and 115.36.0. The latter is specifically for Windows 7/8.1 and macOS 10.12 to 10.14. These enterprise-focused builds incorporate the same security fixes relevant to their codebase, ensuring legacy system users are protected.
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