Firefox 146 provides Home windows backup, improved privateness, and safety fixes
With the replace to the most recent Firefox 146 model, you may get pleasure from quite a few new options and enhancements. A brand new backup characteristic saves essential information even with out synchronization, and utilizing the Firefox Labs experiments shall be simpler. Plus, a number of safety flaws have been fastened.
Mozilla plans to launch the subsequent model, Firefox 147, on January thirteenth, 2026 (which coincides with Microsoft’s subsequent Patch Tuesday).
What’s new in Firefox 146?
Firefox 146 gives Home windows customers with a backup characteristic for all essential information. Its major objective is to make it simpler to change from Home windows 10 to Home windows 11. With out synchronization, which might require you to log in, you may again up your browser information regionally or to OneDrive in order that it’s out there in your new Home windows 11 PC. (This backup characteristic is rolling out steadily, so isn’t out there on all programs but.)
For the climate report on Firefox’s homepage, it is smart for the browser to know your location. Nevertheless, this isn’t at all times fascinating, as privateness is fairly essential to Firefox customers. For customers within the EU, the situation is now solely decided with the person’s consent (opt-in). This new enchancment can be being launched steadily.
Now you can additionally activate experimental options in Firefox with out having to take part within the transmission of telemetry information.
Safety fixes in Firefox 146
Mozilla lists not less than 13 eradicated safety vulnerabilities within the 2025-92 Safety Advisory. 5 of the externally reported vulnerabilities are categorized as excessive threat, with two of them referring to errors within the JavaScript JIT compiler. A use-after-free (UAF) vulnerability has additionally been fastened within the WebRTC element.
The final two entries within the Safety Advisory concern an unspecified variety of internally found flaws, that are lumped beneath CVE-2025-14332 and CVE-2025-14333. They’re solely thought-about medium threat. Assaults on these vulnerabilities will not be but recognized.
Additional browser updates
Along with Firefox 146.0, ESR variations 140.6.0 and 115.31.0 are additionally now out there, though the latter is just out there for Home windows 7 and eight.1 and macOS 10.12 to 10.14. In these variations, Mozilla has fastened the above-mentioned vulnerabilities which can be already current within the code of those browser generations, a few of which had been fairly previous.
The newest Tor Browser 15.0.3 relies on Firefox ESR 140.6 and comes with the NoScript 13.5.2 extension. For customers of Home windows 7 and eight.1 and macOS 10.12 to 10.14 solely, Tor Browser 13.5.26 relies on Firefox ESR 115.31, together with NoScript 13.5.2. The Tor Undertaking now hosts NoScript for its browser itself, as seen by the truth that the NoScript model has the suffix “.1984” (at the moment 13.5.2.1984). In any other case, it’s similar to the model on Firefox’s Add-On Retailer.
Thunderbird 146.0, which may now deal with Trade, and 140.6.0esr have additionally been launched. The builders have fastened one or two safety vulnerabilities that the mail app inherited from Firefox.
This text initially appeared on our sister publication PC-WELT and was translated and localized from German.
