Firefox 151 brings a big privacy boost and fixes 30+ security flaws
Firefox 151 has been released, introducing significant privacy enhancements and fixing over 30 security vulnerabilities. The update features improved tracking protection and new functionalities such as PDF merging and expanded VPN locations. Users can now clear entire private browsing sessions with a single click, enhancing user experience and security.
- ▪Firefox 151 fixes over 30 security vulnerabilities, including four high-risk flaws.
- ▪The update introduces enhanced privacy features with 14% better tracking protection.
- ▪New functionalities include PDF merging capabilities and expanded VPN locations across several countries.
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News Firefox 151 brings a big privacy boost and fixes 30+ security flaws Firefox 151 is out for Windows, macOS, Linux, and Android with fingerprinting protection, PDF merging, VPN locations, and security fixes. By Frank Ziemann Contributor, PCWorld May 20, 2026 9:29 am PDT Image: Mozilla Summary created by Smart Answers AIIn summary:PCWorld reports that Firefox 151 fixes over 30 security vulnerabilities, including four high-risk flaws that could allow browser sandbox escape.The update introduces enhanced privacy features with 14% better tracking protection and one-click private browsing session clearing.New functionality includes PDF merging capabilities and expanded VPN locations across US, Canada, UK, France, and Germany.
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