Mozilla has added a free Firefox built-in VPN to its browser with the release of Firefox 149. The feature arrived on March 24, 2026, and gives users up to 50GB of protected browsing data each month at no cost. It requires no extra downloads, no extensions, and no third-party subscriptions. For casual users who want basic privacy protection without setting anything up, it is a significant move. But the feature is more limited than its name suggests, and understanding exactly what it does matters before you rely on it.
How the Firefox Built-In VPN Works
The feature works by routing your browser traffic through a secure proxy server. When it is active, websites and networks see the proxy’s IP address rather than your own. This masks your location and identity while you browse within Firefox.
You activate it with a single toggle in the top-right corner of the browser. A Mozilla account is required to use it. Once enabled, the proxy handles all traffic generated inside the browser window.
You can also create exceptions. Firefox lets you exclude up to five domains from the proxy routing through the privacy settings panel. This is useful for sites that may break when accessed through a proxy, such as certain banking portals or local services.
When you approach the 50GB monthly cap, the browser sends an in-browser notification. If you reach the limit, VPN protection pauses until the next cycle begins. Firefox will ask you to confirm you are happy to continue browsing without it.
What the Firefox VPN Does Not Do
This is where the distinction matters. The Firefox built-in VPN is not a traditional VPN. It only protects traffic inside the Firefox browser. Every other app on your device — your email client, system processes, other browsers, games, and any other software — continues to connect to the internet through your normal, unmasked connection.
A full VPN routes all of your device’s traffic through an encrypted tunnel. This one does not. It is closer to a browser proxy than a true VPN, and Mozilla’s own paid product, Mozilla VPN, is a separate service that covers your entire device.
It also does not offer the multi-hop anonymity of tools like Tor. There is one proxy hop between you and the destination. That is enough to hide your IP from the sites you visit, but it is not designed for high-stakes anonymity.
Mozilla is clear that it does not log the websites you visit, the contents of your communications, or your browsing activity. It collects limited technical data, such as connection status and aggregate data usage. Certain internal services are excluded from proxy routing by design, including account authentication flows and public Wi-Fi login pages.
Who Should Use It
The Firefox built-in VPN makes sense for specific, everyday situations. Using public Wi-Fi in a coffee shop or airport is a common scenario where hiding your IP offers real value. The same applies to health-related searches, online shopping, or any browsing session where you would prefer not to have your real IP address visible to the sites you visit.
For these use cases, 50GB a month is more than enough. Streaming or downloading large files will eat through the allowance quickly, but regular web activity will not.
If you need protection beyond the browser, a dedicated VPN service remains the right tool. Services like NordVPN, ExpressVPN, or Surfshark encrypt all traffic at the device level and offer significantly more server locations and privacy features than a browser proxy can provide.
Availability and What Else Came With Firefox 149
The Firefox built-in VPN is rolling out progressively. It launched in the United States, United Kingdom, Germany, and France. Not every user in those countries will see it immediately, as Mozilla is deploying it in stages. There is currently no confirmed timeline for expansion to other regions.
Firefox 149 also introduced several other updates worth noting. A Split View feature now lets you place two tabs side by side in a single window. Tab Notes adds quick in-browser note-taking. PDF performance has improved through hardware acceleration. The release also fixed 19 high-severity security flaws and strengthened defenses against malicious notification spam by automatically revoking permissions for flagged sites.
Final Thoughts
The Firefox built-in VPN is a genuinely useful addition for everyday browser privacy. It lowers the barrier for users who want basic IP masking without paying for a subscription or installing a third-party tool. Mozilla’s commitment to not logging browsing activity is also a meaningful differentiator from many free VPN services, which often monetize user data.
However, it is not a replacement for a full VPN. If your goal is device-wide privacy, protection across all apps, or access to geo-restricted content, a standalone VPN service will serve you far better. Think of the Firefox feature as a solid first layer of browser-level protection, not a complete privacy solution.
