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The Best Free & Premium Firefox VPN Extensions

Illustration of laptop computer with Mozilla Firefox logo in the center

Simon Migliano is a recognized world expert in VPNs. He's tested hundreds of VPN services and his research has featured on the BBC, The New York Times and more.

Fact-checked by JP JonesAdditional Testing by David Hughes

Firefox’s Private Browsing mode isn’t enough to protect your privacy while web browsing.

The best free and premium VPN extensions for Firefox secure your web traffic, hide your IP address, and unblock geo-restricted websites, including Netflix.

Top-rated Firefox VPN add-ons also prevent your Internet Service Provider (ISP) from monitoring and recording your web browsing activity.

What Is the Best VPN for Firefox in 2024?

Based on our latest browser tests, the best VPN add-ons for Firefox are:

  1. ExpressVPN: Best VPN Extension for Firefox
  2. NordVPN: Best Cheap VPN for Firefox
  3. CyberGhost: Most Trustworthy Free VPN Add-on for Firefox
  4. Windscribe Free: Best Free Firefox Proxy for Streaming

The best VPN for Firefox in 2024 is ExpressVPN. Its user-friendly VPN extension encrypts your browser traffic and changes your IP address via 160 global server locations. ExpressVPN is also capable of unblocking dozens of streaming websites.

Comparison of the Best VPN Add-ons for Firefox

The table below compares the best Firefox VPN extensions, based on the level of encryption they offer, access to Netflix, number of servers, and more:

EXPERT ADVICE: Beware, many Firefox VPN add-ons are web proxies that don’t encrypt data transfers. Many also log your web browsing data. We also reviewed Mozilla VPN, Firefox’s own VPN, but it’s not built-in to Firefox and it doesn’t include a browser extension, either.

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Analysis of the Best Free & Premium Firefox VPNs

  1. 1. ExpressVPN: Best VPN for Firefox

    Full VPN functionality, advanced security, and great streaming access.

    Ranked #1 out of 65 VPNs for Firefox
    ExpressVPN's new app on mobile devicesVisit ExpressVPN

    • Firefox extension is a fully featured VPN
    • Advanced HTML geo-spoofing feature
    • Works with 18 Netflix regions
    • Working WebRTC leak protection
    • Privacy-friendly logging policy
    • VPN servers in 106 countries

    • Requires the main VPN application to run
    • More expensive, with no free version

    Overall Firefox Rating: 9.6/10

    This overall rating is calculated based on the following category ratings. To learn more, read our Firefox VPN testing methodology.

    • 9.6/10
    • 9.9/10
    • 9.9/10
    • 9.0/10

    ExpressVPN is currently the best VPN for Firefox. It protects your whole device, not just your Firefox traffic.

    It has a large server network, advanced extension features like HTML5 geo-spoofing, and can unblock international Netflix libraries. There’s no free version, but ExpressVPN offers everything you could want from a Firefox browser extension.

    ExpressVPN's browser extension for Firefox

    Extension Available for Free?No
    Cheapest Price$6.67/mo over 15 Months See all plans
    Logging PolicyNo Identifying Data
    Data CapUnlimited
    Data LeaksNo

    Extremely private encryption

    Unlike most VPN browser extensions, ExpressVPN’s add-on works alongside the main VPN app to provide full device protection.

    This means you can control the full VPN without leaving the Firefox browser window.

    The ExpressVPN Firefox add-on encrypts your internet traffic with the unbreakable cipher AES-256.

    Additionally, the VPN extension includes a VPN kill switch, WebRTC leak blocking, HTML geo-spoofing, and HTTPS Everywhere to further secure your web browser traffic.

    ExpressVPN Firefox Browser Extension on macOS

    ExpressVPN’s Firefox extension has a number of extra features, including HTTPS Everywhere.

    Moreover, ExpressVPN doesn’t collect any personally-identifiable user web logs. In other words, ExpressVPN’s servers won’t track or store your web browsing activity.

    Great Firefox extension for streaming

    For Firefox VPN users hoping to find a VPN extension that works with Netflix, look no further.

    ExpressVPN is the best VPN for Netflix, unblocking 18 international libraries. It also works with Disney+, Hulu, BBC iPlayer, HBO Max, and many more services.

    You can connect to over 160 locations across the globe directly through ExpressVPN’s extension. It’s the same amount as the full app, making your online browsing life easy and simple.

    If you ever run into issues with the VPN, you can contact its 24/7 live chat support, who in our experience are always quick and helpful.

    Overall, ExpressVPN is the top VPN extension for Firefox if you want full control of your VPN from your web browser.

  2. 2. NordVPN: Best Cheap VPN for Firefox

    An affordable, top-rated VPN with a secure Firefox extension.

    NordVPN Mobile App ScreenshotVisit NordVPN

    • Encrypted extension for Firefox
    • Very fast VPN speeds
    • Working WebRTC leak protection
    • Full server network available
    • Private logging policy
    • 24/7 live support

    • Can’t use Firefox extension & desktop app together
    • Doesn't accept PayPal
    • Unreliable at unblocking Netflix

    Overall Firefox Rating: 9.4/10

    This overall rating is calculated based on the following category ratings. To learn more, read our Firefox VPN testing methodology.

    • 9.8/10
    • 9.8/10
    • 9.6/10
    • 8.0/10

    NordVPN offers a Firefox extension that is not as advanced as the full VPN but compliments it very well.

    There’s no server differences and it has a number of nice security features for browsing on Firefox specifically, including CyberSec to stop pop-up ads and malicious sites.

    NordVPN's browser extension for Firefox

    Extension Available for Free?No
    Cheapest Price$3.29/mo over 2 years See all plans
    Logging PolicyNo Identifying Data
    Data CapUnlimited
    Data LeaksNo

    Extremely safe Firefox VPN

    NordVPN has a private logging policy, backed by an independent audit. It doesn’t log any identifiable data and this applies to its Firefox extensions users, too.

    It also owns and manages its own DNS servers, meaning that it personally handles your online requests to ensure maximum privacy.

    Useful selection of extension features

    NordVPN’s Firefox add-on includes WebRTC leak blocking to mask your real IP address. It also comes with CyberSec, an effective ad-blocker and anti-phishing feature.

    On top of this is the NordVPN whitelister. This tool allows you to specify which websites you want to run through the encrypted VPN tunnel and which you don’t.

    NordVPN Firefox Browser Extension on macOS

    NordVPN’s Firefox browser extension settings.

    Unreliable for Netflix but simple to use

    Unlike the full VPN app, we found US Netflix access to be hit and miss. Sometimes we managed to unblock the Netflix American library, and other times we did not.

    Thanks to its minimal interface, NordVPN is very easy to use. You can select servers and toggle on the additional security features, and that’s about it.

    This isn’t as expansive as one might hope from a paid VPN, especially compared to ExpressVPN, but it’s good for newcomers.

    You can select the same number of countries as the full app but you can’t choose specific cities.

    As a stripped back version of NordVPN, the Firefox extension is limited but effective.

  3. 3. CyberGhost: Most Trustworthy Firefox VPN

    A free Firefox VPN with unlimited data and easy access to US Netflix.

    CyberGhost appVisit CyberGhost

    • Easy unblocking of US Netflix
    • Encrypts data at device level
    • Free to install
    • Extremely simple to use
    • No data limit

    • Encryption is via 128-bit
    • Only four locations available
    • No additional security features

    Overall Firefox Rating: 6.7/10

    This overall rating is calculated based on the following category ratings. To learn more, read our Firefox VPN testing methodology.

    • 9.5/10
    • 6.0/10
    • 4.0/10
    • 4.5/10

    CyberGhost offers a completely free VPN extension for Firefox. It encrypts data via 128-bit cipher, making it safer than a standard proxy, and unblocks US Netflix reliably.

    It’s a sparse extension, with only four locations and a connect button available. But for zero cost there’s nothing to lose, and it comes from a long-standing name that we know and trust.

    Extension Available for Free?Yes
    Cheapest Price$2.03/mo over 28 months See all plans
    Logging PolicyNo Identifying Data
    Data CapUnlimited
    Data LeaksNo

    Free and encrypted for Firefox

    CyberGhost’s Firefox extension is completely free to install and use.

    It’s not the most eye-pleasing browser add-on we’ve tested, but it’s very simple to use. There’s one large connect toggle, and a drop down menu with server options.

    CyberGhost VPN's browser extension

    The CyberGhost browser extension.

    The VPN extension comes with 128-bit encryption, and in our tests it successfully changed our IP address while encrypting our data transfers.

    Best Firefox extension for US Netflix

    Unlike most Firefox extensions, CyberGhost has proven to be very consistent at unblocking the American Netflix library.

    We gained access to US Netflix via its US server frequently, and easily. To stream US Netflix on Firefox with a free VPN, we highly recommend CyberGhost.

    No security features and very few locations

    Very different to the full VPN that has 91 countries to connect to, CyberGhost’s Firefox extension is only made up of four location options: Germany, Netherlands, Romania, United States.

    It’s not essential to have a huge amount of servers for a browser extension. Most of the time people want a local IP. However, it does mean that your VPN speeds might be effected depending on where in the globe you are situated.

    On top of that, CyberGhost’s Firefox extension includes no additional security features. There’s no ad blocker, anti-malware, or geo-spoofing technology. It really is a one-button tool.

    This is good for simplicity but unimpressive as a long-term solution to your internet security and privacy.

  4. 4. Windscribe Free: Best Free Firefox Proxy for Streaming

    Free Firefox proxy add-on good for streaming and light web browsing.

    The Windscribe VPN app running on two mobiles; one displaying connection options, the other connected to a New York server.Visit Windscribe

    • Unblocks many streaming services
    • GPS geo-spoofer
    • WebRTC leak protection
    • Tracker, malware, and cookie blocker
    • Minimal logging
    • Free and paid version available

    • No VPN encryption
    • Won't work in high censorship countries
    • Doesn't unblock US Netflix
    • 1GB monthly data limit
    • No human live chat

    Overall Firefox Rating: 6.1/10

    This overall rating is calculated based on the following category ratings. To learn more, read our Firefox VPN testing methodology.

    • 1.0/10
    • 9.5/10
    • 9.5/10
    • 9.5/10

    The Windscribe Firefox extension is a proxy rather than a VPN. The add-on won’t fully encrypt your browser traffic like a VPN extension.

    Having said that, Windcribe’s free Firefox extension comes with a number of good security features, and it reliably unblocks many streaming websites.

    Windscribe Free's VPN extension for Firefox

    Extension Available for Free?Yes
    Cheapest PriceFree
    Logging PolicyNo Identifying Data
    Data Cap10GB
    Data LeaksNo

    A good free proxy for unblocking websites

    Windscribe’s free proxy for Firefox is ideal for unblocking video content websites.

    In our streaming tests it unblocked many popular streaming services like Hulu, Disney+, HBO Max and BBC iPlayer.

    However, and much to our surprise, the free extension no longer works with Netflix, especially the American library. The paid version still works, though.

    Keep it mind that the free Windscribe extension only has 10 free server locations, and it limits usage to 1GB of data each month.

    Not a full VPN, but includes useful extra settings

    The Windscribe extension isn’t a VPN add-in, and therefore doesn’t come with full encryption. We always recommend using it alongside the full VPN app.

    Windscribe Firefox Browser Extension on macOS

    Windscribe’s Firefox browser extension comes with an ad, tracker, and malware blocker.

    But, there are many useful privacy and security features that block ads, trackers, malware, and WebRTC leaks.

    In fact, Windscribe’s extension is one of the best VPN ad blockers we’ve tested.

    Furthermore, like ExpressVPN, Windscribe can also spoof your GPS location and web browser time to match the proxy location you’re connecting to.

What’s the Best Free VPN for Firefox?

CyberGhost, Hide.me, and Windscribe all offer free browser extensions for Firefox.

However, only CyberGhost offers a fully encrypted VPN extension.

Currently, the best free Firefox VPN is CyberGhost. While the extension only offers four country locations to connect to, and very limited security settings, it does encrypt your web traffic with 128-bit encryption.

The CyberGhost VPN Extension

The CyberGhost VPN Extension.

CyberGhost’s Firefox VPN extension is also our top recommendation for unblocking American Netflix from overseas.

The video below shows how easy it was for us to unblock US Netflix using the free CyberGhost Firefox browser extension:

Unblocking US Netflix using CyberGhost's Firefox VPN extension

Do I Need a VPN for Firefox?

A character avoiding dangerous browsers
Firefox has a reputation for being more privacy-friendly than Google Chrome.

There’s some truth to the statement above. With some configuration, we recommend Firefox as the best browser for privacy.

However, just browsing the web with Firefox won’t protect your online privacy and security – you can still be tracked or hacked.

Even Firefox’s Private Browsing – which erases passwords, cookies, and history – doesn’t make you completely safe.

Firefox itself has warned as much:

“Private Browsing doesn’t make you anonymous on the internet. Your internet service provider, employer, or the sites themselves can still gather information about pages you visit. Private Browsing also doesn’t protect you from keyloggers or spyware that may be installed on your computer.”

VPNs encrypt all internet traffic flowing through your device. They mask your real IP address with a fake one. No browser can do this, and it ensures your online searches remain private.

Remember that if you log into a web service, like Gmail or Twitter, you’ll no longer be anonymous even if your VPN is running.

If you already use a VPN on your desktop computer, you don’t necessarily need a VPN browser add-on. Your web traffic will still travel through the encrypted VPN tunnel.

However, a Firefox-specific VPN extension comes with additional and convenient features. This includes ad and malware blockers as well as WebRTC leak protection.

Also, VPN extensions can be easier to use. A browser VPN is instantly accessible as you’re browsing the web. You can change IP address without having to open the VPN application.

The best Firefox VPNs also let you unblock websites blocked by schools, access geo-restricted sites, and bypass online restrictions at the workplace.

How to Add a VPN Extension to Firefox

To use a VPN with Firefox, start by searching for your chosen VPN on the Firefox add-ons website.

Make sure it’s the VPN service provider’s official extension to avoid downloading the wrong (potentially malicious) extension. Then, click ‘Add to Firefox’.

Once you’ve added the extension, depending on whether it’s free or not, you may have to sign in with your VPN account credentials.

From here, you’ll be able to choose the VPN server location and connect from within your Firefox browser window.

Some Firefox VPN browser extensions, like ExpressVPN’s, require the main application/client to run simultaneously. Otherwise, the VPN extension won’t work on its own.

For detailed setup instructions, read our guide on how to set up a VPN on Firefox.

How to Stop WebRTC Leaks on Firefox

An illustration of how to fix a leaky VPN

WebRTC is a browser-based technology that allows audio and video communications to work inside the browser. But it’s not great for privacy.

WebRTC can reveal your true IP address even when you use a VPN – we call these WebRTC leaks.

The best VPN services and browser extensions block WebRTC leaks so that your real IP address remains hidden and protected.

To be extra sure, we recommend disabling WebRTC manually within Firefox’s settings. That’s because many VPNs suffer from WebRTC leaks even with leak protection enabled.

To fix WebRTC leaks, read our step-by-step guide to preventing VPN leaks.

How We Test VPNs for Firefox

We use our own unique rating system to test and evaluate Firefox VPN add-ons. In the table below, you can see how the best VPNs for Firefox perform in each testing category:

The process of rating VPN browser extensions is different to the one we use for full VPN applications, as there are typically restrictions and subtle differences that users aren’t aware of.

That’s why we start from scratch, and test all Firefox VPN extensions independently of how the full VPN application performs.

For Firefox extensions, we test for the following attributes:

  • Is the Firefox extension a proxy or a fully featured VPN?
  • Does the extension use AES-256 or ChaCha20 encryption?
  • How well does the extension perform in streaming tests?
  • How many server locations are available?
  • Are there any additional security features on the browser extension, such as ad blockers, tracker blockers, anti-malware technology, or WebRTC leak blocking?

How well each VPN answers these questions make up its final rating. Below you can see how much of the overall rating these key testing areas make up.

1. Extension Encryption: 40%

Minimum Requirement: An extension that encrypts all browser traffic.
We Recommend: Industry-standard encryption of traffic and a clear logging policy.

VPN encryption is what sets a browser extension apart from a low-level proxy, or spoofer. It’s what makes it a VPN, essentially.

While proxies can unblock websites by changing your IP like a VPN does, a VPN is different (and superior) because it works at a device-level and encrypts all the data flowing through your device. Proxies leave your data open to prying eyes.

We look for encryption protocols like OpenVPN and WireGuard and ciphers like AES-256. Those that offer less robust encryption like SSTP have a lower rating, but are still preferable over a proxy.

On top of that, we inspect the VPNs privacy policy for any differences between its full app and browser extension. We like to see them as aligned as possible, ideally identical, and for the privacy policy to be as close to zero-logs as possible.

You can read more about the differences between VPNs and proxies in our in-depth guide.

2. Firefox Streaming: 20%

Minimum Requirement: Unblocks US Netflix reliably.
We Recommend: Unblocks multiple Netflix libraries on multiple servers with ease.

While privacy is our most important value, we’re aware that browser extensions are hugely popular as most people want to access geo-restricted streaming services.

That’s why we’ve attached 20% of our overall rating to a Firefox extension’s ability to access streaming services otherwise restricted.

We test each VPN extension on Netflix to see whether it can unblock the many different libraries across the globe. The more it can access, and the speed and ease with which it does it, the higher we rate the VPN extension.

This is particularly important for extensions, which often perform differently to the full VPN app.

3. Extension Server Locations: 20%

Minimum Requirement: At least three countries, including one at home.
We Recommend: No difference between the full VPN and the browser extension.

The more locations available to establish secure connections the better.

While it isn’t essential to have hundreds of available countries if you simply want to spoof your IP at home, we reserve praise for VPN extensions that are as close to its full app as possible.

It also allows the possibility to connect to more streaming libraries from across the globe.

4. Additional Firefox Features: 20%

Minimum Requirement: WebRTC blocking.
We Recommend: Additional tools useful for secure Firefox browsing, such as an ad blocker or geo-spoofing.

Firefox is known to cause VPNs to leak WebRTC. This is a security risk whenever you use voice or video chat in your browser.

Therefore, we want to see Firefox extensions with WebRTC leak protection.

Beyond that, features like an ad and tracker blocker provide additional value. Best of all is a HTML geo-blocker to prevent real location reveals.

Does Firefox Have a Built-In VPN?

Firefox doesn’t have a built-in VPN. Instead, Mozilla operates two products that you can use with Firefox: a proxy extension, and a full VPN application.

Firefox Private Network

The proxy add-on is called Firefox Private Network but it’s currently in beta, and available to US users only.

Keep in mind that the add-on is a proxy and not a VPN. While it will change your IP address, it won’t encrypt your web traffic.

Furthermore, the add-on doesn’t let you choose server locations to connect to. Cloudflare, which provides the proxy service, states in its privacy policy that “avoidance of geographical restrictions is explicitly not the goal.”

There is nothing wrong with Firefox’s proxy, but it lacks some of the fundamental utility offered by other proxies, and much of the security offered by a full VPN.

While we generally recommend Firefox as the best browser for privacy, the same cannot be said of its VPN extension.

The lack of important usability and security means you should use a secure Firefox VPN, instead.

Mozilla VPN

Mozilla also has a standalone full VPN application that uses Mullvad VPN’s servers, called Mozilla VPN.

While it’s not built into Firefox, and it’s not free, our Mozilla VPN tests found it to be a good VPN.

Mozilla VPN is not built-in to Firefox; you have to install it, it doesn’t have a browser extension, and it costs money – $4.99 per month on its cheapest subscription.