Best VPN for Firefox in 2026: Extensions vs Full Apps
ExpressVPN is our Firefox-specific pick because its maintained hybrid extension works alone or alongside the full VPN app.
By Erwin Caniba · Updated July 22, 2026
A Firefox VPN can mean 2 different things: an extension that handles Firefox traffic only, or a full app that protects the whole device. Choose the wrong format and your browser may use the VPN while email, launchers, and background apps remain on your normal connection.
The best Firefox VPN in 2026 is ExpressVPN. Its maintained hybrid extension works as a standalone browser proxy or with the desktop app for full-device coverage. NordVPN is the stronger all-around service by our fixed scores, Surfshark adds useful browser controls, and Proton VPN is the best free-account option.
Firefox extension or full VPN app: which do you need?
Most Firefox VPN extensions are encrypted proxies. They change the IP address websites see and route Firefox traffic through the provider, but they do not tunnel every app on your device. NordVPN, Surfshark, and Proton VPN state this browser-only boundary directly.
A full VPN app works at the operating-system level. It covers Firefox, other browsers, email, messaging, and background services unless you exclude something with split tunneling. Use the app for device-wide connection privacy.
ExpressVPN’s hybrid extension can run independently in proxy mode or pair with its app. Pairing adds full-device coverage while retaining WebRTC leak blocking and HTML5 geolocation handling in Firefox. Try it first with ExpressVPN’s free trial before committing.
Firefox also introduced a built-in VPN in a staged 2026 rollout. Mozilla says it masks Firefox traffic only. The separate Mozilla VPN product covers the full device, while its extension adds browser and per-site controls. Mozilla VPN is a credible non-roster alternative with no affiliate link here.
Best Firefox VPNs compared
| Provider | Our score | Firefox extension in 2026 | Coverage | Best for |
|---|---|---|---|---|
| ExpressVPN | 9.5/10 | Actively updated hybrid extension | Browser proxy alone or full device when paired with the app | Best Firefox-specific setup |
| NordVPN | 9.7/10 | Actively updated proxy extension | Firefox traffic only; full app is separate | Best all-around VPN |
| Surfshark | 9.3/10 | Actively updated browser extension | Firefox traffic only; full app is separate | Browser privacy controls |
| Proton VPN | 8.6/10 | Active extension with 2026 release notes | Firefox traffic only; full app is separate | Best free-account option |
1. ExpressVPN: best VPN for Firefox overall
ExpressVPN takes the top spot because its Firefox extension gives you a clear choice. Use it alone as a browser proxy, or connect it to the desktop app so Firefox controls a device-wide VPN connection. Its Mozilla listing and release notes both show 2026 activity.
WebRTC protection is designed to stop Firefox from exposing your normal IP through real-time communication. HTML5 geolocation handling helps align supported website location requests with the VPN location. These controls do not make the browser anonymous, but they address gaps a basic proxy may leave.
Standalone mode still covers Firefox only, so the rest of the device needs the app. ExpressVPN is also part of Kape Technologies, which matters if you prefer independent ownership.
Choose it for the cleanest route from browser-only protection to a full-device VPN. See our full ExpressVPN review for the broader assessment.
2. NordVPN: best all-around service with a Firefox proxy
NordVPN has our highest fixed roster score at 9.7/10, and its official Firefox add-on showed fresh activity in July 2026. The extension routes Firefox through NordVPN’s proxy servers, changes the IP visible to sites, and includes WebRTC leak prevention.
The drawback is scope. Other browsers and apps keep their existing connection, so install the desktop app for device-wide coverage.
Nord Security and Surfshark share a corporate group but say they operate independently. Choose NordVPN if its higher all-around score matters more than ExpressVPN’s hybrid design. Read our full NordVPN review.
3. Surfshark: best for extra browser controls
Surfshark’s Firefox documentation was refreshed in July 2026, and its Mozilla add-on was updated in 2026. The extension includes WebRTC protection, CleanWeb controls for ads and warnings, and website exclusions.
The extension covers only browser traffic, and Surfshark warns that connecting it with the desktop app can interrupt the connection. Use one mode at a time unless you configure Surfshark’s documented bypass.
Choose Surfshark when browser controls and site exclusions matter most. Our full Surfshark review covers the service beyond Firefox.
4. Proton VPN: best free Firefox extension
Proton VPN offers its Firefox extension to anyone with a Proton account, including Free users. Its release history lists version 1.3.0 in April 2026, and Mozilla showed another update in June. Website split tunneling is included. If free proxy sites tempt you instead, see our proxy sites vs VPNs comparison for why a reputable free VPN is the safer choice.
The limitation is familiar: the extension protects Firefox exclusively. You need the separate Proton VPN app for device-wide coverage.
Choose Proton VPN to try a maintained extension without paying first. Read our full Proton VPN review before upgrading.
CyberGhost and Private Internet Access still have Firefox add-ons, but Mozilla showed their latest updates in 2025 and 2024 respectively. Age alone does not prove an add-on is unsafe; it simply provides weaker evidence of active 2026 maintenance than the picks above.
What to check before installing a Firefox VPN
Start with coverage. If you only want websites in Firefox to see the provider’s IP address, an extension is the lighter option. If you want protection for the entire device, install the native VPN app. For a broader provider comparison that is not limited to one browser, use our guide to the best VPN services.
Install from the provider’s own Firefox page or follow its link to Mozilla Add-ons. Check the publisher, requested permissions, version history, and recent update date. A familiar logo is not enough to prove that a lookalike extension is legitimate.
Decide whether the add-on should run in Private Browsing. Firefox does not enable ordinary extensions in private windows by default; you must grant that permission. Private Browsing also does not replace a VPN: it limits local history and site data, while the VPN or proxy changes the network route.
How to set up a Firefox VPN safely
- Decide whether you need Firefox-only routing or full-device protection.
- Open the provider’s official site and follow its Firefox download link to Mozilla Add-ons.
- Confirm the publisher and review the permissions and version history before installing.
- Add the extension, sign in if required, and connect to the location you need.
- If you use Private Browsing, open Firefox’s extension settings and explicitly allow the add-on in private windows.
- Check the public IP shown inside Firefox after connecting. If the extension offers WebRTC protection, confirm that it is enabled.
- Install the provider’s full app instead when you also need to protect non-Firefox traffic. Follow the provider’s guidance before running an app and extension together. Our VPN for beginners guide covers full-device setup steps like the kill switch in more detail.
Our pick
ExpressVPN is the best Firefox VPN in 2026 because its maintained hybrid extension handles both sides of the decision. Proxy mode provides Firefox-only routing, while supported app pairing extends protection to the whole device. NordVPN remains our higher-scored all-around service, but ExpressVPN is the better Firefox-specific fit.
FAQ
Is the built-in Firefox VPN enough?
It is enough only if you want to mask traffic that originates in Firefox and the feature is available to your account. Mozilla says the built-in VPN does not protect other apps. Use a full-device product such as the separate Mozilla VPN app or one of the native provider apps above when you need wider coverage.
Is a Firefox VPN extension a real VPN?
Usually it is an encrypted browser proxy, not a system-wide VPN tunnel. NordVPN, Surfshark, and Proton VPN explicitly limit their extensions to browser traffic. ExpressVPN’s hybrid extension can also pair with its native app for full-device protection.
Can a Firefox VPN extension work in Private Browsing?
Yes, if the extension supports it and you grant permission. Firefox keeps extensions out of private windows by default, so open Add-ons and themes, select the extension, and allow it to run in Private Windows.
What is the best free VPN extension for Firefox?
Proton VPN is the best free-account choice in this shortlist because its Firefox extension is available to Proton Free users and showed active 2026 maintenance. Firefox’s own built-in VPN is another browser-only option for eligible users. Neither choice protects the rest of the device unless you also use a full VPN app.
Erwin Caniba