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The Best Firefox VPN Add-Ons

Illustration of laptop computer with Mozilla Firefox logo in the center
Simon Migliano Head of Research at Top10VPN

Simon 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, CNet and more. Read full bio

VPN extensions for Firefox hide your IP address and unblock websites from around the world, including Netflix.

Additionally, the best Firefox add-ons prevent your Internet Service Provider (ISP) from collecting your web browsing activity.

Even if it has its own Mozilla VPN, Firefox still has issues in terms of online anonymity. Firefox’s Private Browsing mode simply isn’t enough to protect your online privacy and security.

We therefore set out to find the fastest, safest and most effective VPN unblocker browser extensions.

Based on our latest browser tests, the five best free and paid VPNs for Firefox are:

  1. ExpressVPN: The best overall VPN for Firefox. Read Summary
  2. NordVPN: A fast, high-quality Firefox extension. Read Summary
  3. CyberGhost: The best free VPN for Firefox. Read Summary
  4. Hotspot Shield: Good paid and free extension. Read Summary
  5. Windscribe: Best proxy extension for Firefox. Read Summary

There are many VPN add-ons that aren’t worth your time. Most are just web proxies that don’t encrypt your data like a VPN extension does. They also log your browsing data.

Except for Windscribe, all the Firefox extensions we recommend are full VPNs. We’ve chosen them based on their security standards, ability to unblock streaming services, and the number of VPN server locations.

The Top Firefox VPNs: Performance Ratings

Use the table below to compare how the best VPNs for Firefox perform in each of our key testing categories:

The 5 Best VPNs for Firefox (Tested July 2021)

  1. 1. ExpressVPN: Best Overall Firefox VPN

    Full VPN functionality, advanced security, and lots of servers.

    Ranked #1 out of 68 VPNs for Firefox
    ExpressVPN's new app on mobile devices
     96% 
    (1,768 user reviews)
    Visit ExpressVPN

    Pros

    1. Firefox extension is a fully featured VPN
    2. Advanced HTML geo-spoofing feature
    3. Watch restricted Netflix libraries
    4. Working WebRTC leak protection
    5. Privacy-friendly logging policy
    6. VPN servers in 94 countries
    Cons
    1. Expensive with no free version
    2. Requires the main VPN application to run

    Overall Firefox Rating: 9.7/10

    The overall Firefox VPN rating is calculated based on the following subcategory ratings. For more details, read about how we test Firefox VPNs.

    • 9.9
    • 9.3
    • 9.4
    • 9.8

    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.

    Extension Available for Free?No
    Cheapest Price$6.67/mo over 15 Months See all plans
    Logging PolicyAnonymous Server Usage Data
    Data CapNone
    Data LeaksNo

    Ultra-private encryption across device

    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 add-on encrypts your internet traffic with the unbreakable cipher AES-256, and it also comes with a VPN kill switch, WebRTC leak blocking, HTML geo-spoofing, and HTTPS Everywhere to further secure your web browser traffic.

    Moreover, ExpressVPN doesn’t collect any personally-identifiable user web logs. In other words, none of your web browsing activity is tracked or stored on ExpressVPN’s servers. You can rest assured that your Firefox traffic is private.

    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 19 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.

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

  2. 2. NordVPN: High-Quality Extension

    An affordable, no-logs VPN with a robust Firefox extension.

    NordVPN Mobile App Screenshot
     94% 
    (246 user reviews)
    Visit NordVPN

    Pros

    1. Encrypted extension for Firefox
    2. Very fast VPN speeds
    3. Working WebRTC leak protection
    4. Full server network available
    5. Strict zero-logs policy
    6. 24/7 live support
    Cons
    1. Can’t use Firefox extension & desktop app together
    2. Doesn't work well in China
    3. Not unblocking Netflix currently

    Overall Firefox Rating: 9.5/10

    The overall Firefox VPN rating is calculated based on the following subcategory ratings. For more details, read about how we test Firefox VPNs.

    • 9.7
    • 9.4
    • 9.9
    • 9

    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.

    Extension Available for Free?No
    Cheapest Price$3.30/mo over 27 Months See all plans
    Logging PolicyNo Logs
    Data CapUnlimited
    Data LeaksNo

    Extremely safe Firefox VPN

    NordVPN is a no-logs VPN. It records no data on its users 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.

    The extension also encrypts your whole device, meaning its safer than a regular proxy.

    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.

    This is nowhere near as comprehensive as the full NordVPN app, or ExpressVPN’s Firefox extension. But it offers useful tools for those looking to browse Firefox casually and safely.

    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 library, and other times we did not. This inconsistency prevents us from recommending it wholeheartedly.

    Because of 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: Best Free Firefox Extension

    A free Firefox VPN with encryption and easy access to US Netflix

    CyberGhost app
     94% 
    (312 user reviews)
    Visit CyberGhost

    Pros

    1. Easy unblocking of US Netflix
    2. Encrypts data at device level
    3. Free to install
    4. Extremely simple to use
    Cons
    1. Encryption is via 128-bit
    2. Only four locations available
    3. No additional security features

    Overall Firefox Rating: 7.7/10

    The overall Firefox VPN rating is calculated based on the following subcategory ratings. For more details, read about how we test Firefox VPNs.

    • 9.3
    • 9.7
    • 5.8
    • 4.5

    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.

    Extension Available for Free?Yes
    Cheapest Price$2.25/mo over 3 years See all plans
    Logging PolicyAnonymous Server Usage Data
    Data CapNone
    Data LeaksNo

    Free and encrypted for Firefox

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

    It’s not the best looking extension on the market, but once installed you’ll realise how simple it is to use.

    This foolproof extension is entirely made up of one large connect toggle and a drop down menu with server options.

    It comes with 128-bit encryption, meaning that its more advanced than a proxy. CyberGhost will change your IP and encrypt all your data.

    Best Firefox extension for US Netflix

    Firefox extensions often prove very difficult at getting around Netflix restrictions. Even those with a good reputation when it unblocking Netflix on its full VPN app, like NordVPN, may not be as reliable when testing on Firefox.

    Luckily, CyberGhost has proven to be a consistent unblocker of Netflix libraries, even on its Firefox extension. We gained access to US Netflix on its US server frequently, easily, and quickly. For US Netflix on Firefox, we recommend CyberGhost as the best option.

    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. Hotspot Shield: Paid & Free Extension

    Full VPN extension with good security features

    Hotspot Shield mobile screenshots
     88% 
    (5 user reviews)
    Visit Hotspot Shield

    Pros

    1. Premium and free version available
    2. Fully encrypted VPN connections
    3. Ad, tracker, and malware blocker
    4. WebRTC leak protection
    Cons
    1. US Netflix access is inconsistent
    2. No HTML geo-spoofing
    3. Only one server on free version

    Overall Firefox Rating: 7.6/10

    The overall Firefox VPN rating is calculated based on the following subcategory ratings. For more details, read about how we test Firefox VPNs.

    • 8.7
    • 4.5
    • 6.5
    • 9.4

    Hotspot Shield isn’t as robust as the above VPNs but it does have a safe free version extension alongside a premium version and an impressive security package. Connections are encrypted and the extension comes with features like split tunneling, blockers for ads, trackers, cookies, malware, and WebRTC leaks.

    Extension Available for Free?Yes
    Cheapest Price$2.99/mo over 36 Months See all plans
    Logging PolicySome User Logs
    Data CapNone
    Data LeaksNo

    Encrypted paid and free versions

    Hotspot Shield’s Firefox browser extension is available to install as a free and premium version.

    The free version is limited to one location (US), but it’s still an encrypted connection. Encryption is via Hotspot Shield’s in-house Hydra VPN.

    The paid version has nine server locations, which is better but still a relatively small number. Besides, it’s unlikely you’ll need connections outside those available, which includes servers in India, Singapore, and Russia alongside the usual European and North America favorites.

    Lots of added security options

    Hotspot Shield comes with a number of security features on both versions. It blocks ads, trackers, malware, and cookies. It also blocks WebRTC leaks.

    The extension’s home screen shows you how many online threats are blocked in real time, which is a nice detail.

    It also has a split tunneling tool so that you can select certain websites to bypass the VPN encryption.

    And there’s ‘Sword’, which actually feeds trackers false information about your online profile, including your real location, home address, phone number, and so on. It becomes impossible for advertisers to build an invasive profile of you and your inline habits.

    These features are all marked as beta, but we’ve found them all to be effective and useful. For a browser extension Hotspot Shield offers a comprehensive package.

    Doesn't unblock Netflix

    Hotspot Shield disappoints as a Firefox extension for Netflix. We’ve tried to unblock US Netflix while running the extension multiple times, but recorded no success and getting an error code each time.

    The Chrome extension, and the app itself, is more reliable for Netflix, and other streaming sites aside. If you’ve got a premium Hotspot Shield account, we recommend using the full app to stream content.

  5. 5. Windscribe: Best Proxy for Firefox

    Not a fully featured VPN but good for streaming and light browsing.

    Windscribe mobile screenshots
     100% 
    (2 user reviews)
    Visit Windscribe

    Pros

    1. Reliable way to unblock streaming services
    2. Free and paid version available
    3. WebRTC leak protection
    4. GPS geo-spoofer
    5. Tracker, malware, and cookie blocker
    6. Minimal logging
    Cons
    1. No VPN encryption
    2. Won't work in high censorship countries
    3. No human live chat

    Overall Firefox Rating: 6.0/10

    The overall Firefox VPN rating is calculated based on the following subcategory ratings. For more details, read about how we test Firefox VPNs.

    • 1
    • 9.5
    • 9.5
    • 9.5

    While the Windscribe Firefox extension doesn’t encrypt your whole device, it’s still a useful proxy. It has a number of nice security features, like HTML geo-spoofing, and it reliably unblocks streaming channels.

    It’s not the safest option, but it can be a useful tool for quick streaming and lightweight browsing as long as you know the risks, especially as there’s a generous free version.

    Extension Available for Free?Yes
    Cheapest Price$4.08/mo over 12 Months See all plans
    Logging PolicyAnonymous Server Usage Data
    Data CapNone
    Data LeaksNo

    Not a full VPN, but a useful alternative

    Although the Windscribe extension doesn’t come with full VPN encryption and only encrypts browser traffic (we recommend using it alongside the full VPN app), it’s still a useful tool for browsing the web and unblocking streaming services.

    Windscribe is one of the best VPNs at unblocking Netflix. Using the premium extension grants you access to all the regular VPN servers and allows you to unblock over 40 Netflix libraries. It also works with BBC iPlayer, which it struggled with in the past.

    As for Windscribe’s free VPN extension, it only allows access to 10 countries and it comes with a monthly 10GB data cap. However, it’s a good free option for streaming fans.

    Plenty of Firefox security features

    The paid Firefox add-on has a lot of additional features: ‘ad crusher’, ‘tracker eradicator’ , a real-time ‘malware evader’ , ‘cookie go away’ (blocks cookie banners) and ‘cookie monster’ (automatic cookie deletion). There’s also WebRTC leak blocking.

    Like with ExpressVPN, Windscribe has also the ability to change your GPS location and web browser time to match the proxy location you’re connecting to.

    These are features that will make your Firefox surfing more enjoyable and safer than it would be without the extension. We do recommend running the full VPN together with the Firefox extension, though.

Firefox VPN Comparison

You can compare the top VPNs for Firefox using the comparison table below.

You can see which of the top VPNs have a Firefox extension, whether there’s a free version, if it unblocks US Netflix, and what security features are on offer.

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, this won’t protect your online privacy or personal data 100% – you can still be tracked.

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.

If you already use a VPN on your desktop then there’s no privacy threat and you don’t need VPN for the Firefox browser, as your traffic will still go through the encrypted VPN tunnel.

However, a Firefox-specific extension can come with additional features that make installing one worth your time. This includes ad and malware blockers as well as WebRTC leak protection.

Many people find extensions easier to use, too. When installed on your browser, the VPN is made instantly accessible as you’re browsing the web, meaning you can change IP address without even needing to minimise your web page.

Firefox extensions offer a lightweight solution to people who mostly engage in browser traffic.

How We Test VPNs for Firefox

Although we have collected scores of data over the years that we’ve been testing regular VPNs, the process is different when it comes to VPN extensions.

While a full VPN app might stream US Netflix easily, its browser extension might not be as effective. Furthermore, encryption may be different, and there could be other restrictions and differences that aren’t obvious and the user isn’t aware of.

That’s why we start from scratch and test all of the Firefox extensions independent of how the full VPN performs with its own unique rating system.

For Firefox extensions, we ask these key questions:

  • Is the Firefox extension a proxy or a fully featured VPN? If its a VPN, which we favour, we find out the standard of its encryption.
  • How well does the extension perform in streaming tests independent of how the regular VPN performs? We test the extension on popular platforms like Netflix and BBC iPlayer.
  • How many server connections are available? The more the better.
  • Are there any additional security features on the browser extension that are useful to those surfing the web? This can include ad blockers, tracker blockers, anti-malware technology, WebRTC leak blocking, aor geo-spoofing.

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

1. VPN Encryption: 40%

Minimum Requirement: An extension that encrypts 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 score lower 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. Streaming Access: 20%

Minimum Requirement: Unblocks US Netflix with minimal fuss.
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 score 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 score the VPN extension.

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

3. Number of Servers 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. Security 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.

How to Stop WebRTC Leaks on Firefox

An illustration of how to fix a leaky VPNWebRTC 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 IP address remains hidden and protected.

However, we recommend disabling WebRTC manually within Firefox’s settings to be sure, particularly as many VPNs have been recording WebRTC leaks even with leak protection on. To do this, read our step-by-step guide to preventing VPN leaks.

How To Add an Extension to Firefox

To use a VPN with Firefox, simply search for the VPN on the Firefox add-ons website.

Make sure it’s the VPN 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 its free or not you might have to sign in with your VPN account.

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

Some VPN browser extensions, like ExpressVPN’s Firefox add-on, require the main application/client to be running. In other words, the VPN extension just won’t work on its own.

For detailed instructions, check out our guide explaining how to install a VPN on Firefox.

Firefox VPN FAQ

Does Firefox Have a Built-in VPN?

Mozilla VPN

Firefox has its own VPN called Mozilla VPN that uses Mullvad VPN’s servers. It was once called Firefox VPN and Firefox Private Network.

But this 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.

And it is only available in a few countries, including Canada, US, UK, and Singapore.

While this VPN has some way to go before we’d recommend it, we do like that Firefox are investing in privacy-related technology.

What’s the Best Free VPN for Firefox?

CyberGhost, Hide.me, Hotspot Shield, and Windscribe all offer free browser extensions for Firefox. However, only CyberGhost and Hotspot Shield offer fully encrypted VPN extensions.

At the moment, the best free Firefox VPN is CyberGhost. Although the extensions only has four countries to connect to and no additional security features to speak of, it does encrypt your traffic with 128-bit encryption.

It’s also our top recommendation for accessing streaming services, particularly US Netflix.

Therefore, it’s both safe and useful for entertainment. For zero cost, we can comfortably recommend it.

About the Author


  • Simon Migliano Head of Research at Top10VPN

    Simon Migliano

    Simon 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, CNet and more. Read full bio