Firefox Will Launch a Free Built-In VPN Near Soon?

Mozilla released Firefox 149 today, and the headline feature is impossible to ignore: a free, built-in VPN that requires no extra downloads, no extensions, and no subscription fee. The service gives users in the United States, the United Kingdom, France, and Germany up to 50 gigabytes of monthly data — ten times the free allowance offered by Microsoft’s Edge browser — and promises to hide their IP address and location while they browse.

The announcement marks Mozilla’s boldest bid in years to distinguish Firefox in a browser market where it has been steadily losing ground. Its desktop market share fell from 6.3% to roughly 4.2% over the past twelve months. The free VPN, alongside new productivity tools including Split View and Tab Notes, is Mozilla’s answer to the question: why stay on Firefox?

How the VPN Works

The built-in VPN is not a traditional VPN in the way most users think of one. Rather than tunnelling all device traffic through an encrypted server, it operates as a browser-level proxy: all traffic generated within Firefox is routed through Mozilla’s proxy infrastructure, masking the user’s real IP address from websites and online services. Mozilla says it does not log the sites users visit, meaning the company itself cannot see browsing activity.

Activating the feature requires a free Mozilla account. Once signed in, users can toggle the VPN on directly from the browser toolbar. No server selection or protocol configuration is offered — the aim is frictionless, one-click privacy for everyday browsing rather than the power-user flexibility that premium services provide.

Is It Trustworthy?

Mozilla’s non-profit status and long track record of prioritizing user privacy give it credibility that most free VPN providers lack. The company has built its reputation on a “data minimization” philosophy: collect as little as possible, retain even less. It explicitly frames the browser VPN as an antidote to the opaque data practices common among free third-party VPN extensions, which have in the past been found collecting and selling user browsing data.

That said, important questions remain unanswered. Mozilla has not disclosed which underlying infrastructure or third-party provider powers the proxy — a notable omission given that its previous paid VPN service (discontinued in 2023) was built on top of Mullvad. The company has also not published the results of an independent security audit for the new service. Until such an audit is completed and made public, users cannot fully verify the security properties Mozilla claims.

How It Compares to Alternatives

What Else Arrives in Firefox 149

The VPN is the biggest headline, but Firefox 149 ships a wider slate of improvements. Split View lets users place two tabs side-by-side in a single window — a feature long available in browsers such as Zen and Microsoft Edge that Firefox power users have requested for years. Tab Notes, available through Firefox Labs, allows annotations to be attached to any open tab, useful for research and multi-session workflows.

Mozilla also formally launches the Sanitizer API — a new web security standard that intercepts and neutralises malicious content before it reaches the user — making Firefox the first browser to ship this capability. And the previously named “AI Window” assistant has been rebranded Smart Window, repositioning it as an optional, opt-in tool for in-page help such as definitions, summaries, and product comparisons.

The Business Question

The sustainability of a free 50 GB monthly VPN for potentially millions of users is a genuine open question. Running proxy infrastructure at scale is expensive. Mozilla has not revealed who provides the underlying network, what the cost structure looks like, or how the service will be monetised once it expands. The most plausible explanation is a freemium model: the free 50 GB tier exists to drive adoption and encourage a subset of users to pay for a higher-capacity premium tier in the future — much as Mozilla’s earlier paid VPN product was designed to convert privacy-conscious users.

Firefox’s desktop market share decline gives context to the urgency here. Bundling a meaningful free VPN is a concrete value proposition that Chrome and Safari cannot yet match — and Mozilla is betting that it is enough to give fence-sitters a reason to switch, or at minimum, a reason to stay.

Verdict

For everyday users in the four supported countries who want simple, browser-level privacy without installing anything extra, Firefox 149’s built-in VPN is a genuinely attractive offer. The 50 GB monthly allowance covers most non-streaming use cases comfortably, and Mozilla’s privacy reputation provides a reasonable baseline of trust — more than most free VPN alternatives can credibly claim.

Power users seeking full-device protection, server switching, or geo-restriction unlocking should continue to rely on a dedicated VPN client. And security-conscious users should watch for the publication of an independent audit before placing full confidence in the service’s architecture.

Mozilla’s announcement confirmed the rollout is live today, March 24, 2026, with expansion to additional countries to follow in future Firefox releases.