Firefox's free built-in VPN has no data limit from November 10, 2026 through January 31, 2027, Mozilla announced. That is a window of about 12 weeks, and it covers every Firefox user who has the feature.
A VPN (virtual private network) swaps your real IP address for another one, which masks where you are browsing from. Mozilla pitches the tool mainly as a privacy feature, for example to hide the sites you visit from shared WiFi networks in public spaces or at a relative's home. It also acknowledged that people use VPNs to change location and reach region-locked sites, and said it is fine with that.
The feature runs on Firefox for desktop and Android, and Mozilla said iOS support is coming soon. To use it, create a Mozilla account. On desktop, click the VPN icon in the toolbar. On Android, open the three-dot menu, choose Settings, then VPN, and follow the setup.
The limits matter more than the price. The built-in VPN only works for browsing inside Firefox, so another browser or a mobile app gets no protection from it. Mozilla also reminded users that a VPN does not make them anonymous or erase on-device browsing history, and that sites can still identify people through cookies or a signed-in account.
For anyone who needs coverage across apps, Mozilla sells a separate subscription product, Mozilla VPN. The free offer lands as Mozilla leans on privacy and on AI controls for people who do not want AI in every part of their browser, and after an ad campaign for Firefox that went viral. For a holiday traveler on hotel WiFi, the practical question is how much of their traffic actually runs through the browser.