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Best VPN Addons for Firefox

By Simon Migliano | Updated October 24, 2019

Illustration of laptop computer with Mozilla Firefox logo in the center

Mozilla Firefox is one of the top five most-downloaded web browsers in the world – even if its 6% market share still falls drastically behind Google Chrome at a staggering 60%.

There’s a perception that Firefox is more private than Chrome, but other than a few extra features Firefox doesn’t actually protect your personal data any more than Chrome does.

This is why it’s essential to use a VPN with Firefox.

VPNs keep your ISP from viewing everything you do online, as well as protecting your confidential data from potential snoopers and hackers.

If you’re a heavy browser user you might want to use a VPN browser add-on instead of the full VPN desktop app.

All of the VPNs we’ve recommended in this list come with browser extensions that encrypt your traffic to keep you safe online.

Our top VPN picks for Firefox also provide fast speeds, minimal (or even zero) logging, and access to content from all over the world.

Must-Have Features of a VPN for Firefox

  1. Safe browser extension for Mozilla Firefox
  2. Privacy-friendly logging policy & no IP, DNS, or WebRTC leaks
  3. Fast and reliable speeds
  4. Quick and easy to set up
  5. Effective privacy and security features
  6. Range of well-designed and easy to use custom VPN apps

Wondering why you should trust our reviews?
See How We Review VPNs.

The 5 Best VPN Extensions for Firefox

1. ExpressVPN

Ranked #1 out of 74 VPNs for Firefox

  1. Control the desktop VPN through Firefox browser extension
  2. Excellent VPN speeds & reliability
  3. Works with Netflix, iPlayer & other streaming services
  4. WebRTC leak protection
  5. VPN servers in 94 countries
  6. Privacy-friendly logging policy
  1. More expensive than rivals
  2. Not a lightweight solution
  • Best Price

    $6.67/mo over 15 Months

    See all plans

  • Top Speedi

    85Mbps same city speed

    Based on a 100Mbps test connection

  • Servers

    94 countries, 3,000+ servers

  • Compatible with

    • Windows logoWindows
    • Mac logoMac
    • iOS logoiOS
    • Android logoAndroid
    • Linux logoLinux

The Bottom Line

ExpressVPN is the best VPN we’ve ever tested, and it’s the ideal choice for Firefox users.

In addition to a full range of custom VPN apps for desktop, mobile, and streaming devices, ExpressVPN provides a secure browser extension for Firefox.

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

This means that you can control the VPN without having to exit the browser.

ExpressVPN encrypts internet traffic with ‘unbreakable’ cipher AES-256 and the Firefox extension comes with a VPN kill switch, WebRTC leak blocking, and HTTPS Everywhere to further secure your connection.

While ExpressVPN’s browser extension is one of the safest VPN browser on the market it’s not a lightweight solution as it routes all traffic through the VPN tunnel.

If you’re a heavy browser user and want to protect your browser traffic only, read on to find out which is the best Firefox VPN for you.

If you want full control of your VPN from your web browser, ExpressVPN is the service for you.

For a more in-depth look, read our full ExpressVPN review.

2. NordVPN

Ranked #2 out of 74 VPNs for Firefox

  1. Lightweight proxy extension for Firefox browser
  2. Very fast VPN speeds
  3. WebRTC leak protection
  4. Consistent access to Netflix & BBC iPlayer
  5. Strict zero-logs policy
  6. VPN servers in 59 countries
  1. Can’t use browser extension & desktop app together
  • Best Price

    $3.49/mo over 36 Months

    See all plans

  • Top Speedi

    90Mbps same city speed

    Based on a 100Mbps test connection

  • Servers

    58 countries, 5,500+ servers

  • Compatible with

    • Windows logoWindows
    • Mac logoMac
    • iOS logoiOS
    • Android logoAndroid
    • Linux logoLinux

The Bottom Line

NordVPN is another great VPN for Firefox users, and provides something a little different to ExpressVPN.

While NordVPN’s browser extension for Firefox encrypts your browser traffic, it leaves internet traffic from other apps unprotected.

While this means that it doesn’t provide the same level of security and privacy as its desktop apps, it makes NordVPN’s HTTPS proxy extension ideal for those looking for a lightweight solution for fast browsing.

NordVPN’s Firefox add-on includes WebRTC leak blocking to protect your IP address, and it comes with CyberSec which blocks ads.

If you do want full VPN coverage you can use NordVPN’s desktop and mobile apps, which are very safe to use and will protect your Firefox traffic as well as all your other apps.

NordVPN doesn’t recommend using the browser extension and desktop app together, though, as it can confuse itself resulting in an IP leak.

For a more in-depth look, read our full NordVPN review.

3. Windscribe

Ranked #3 out of 74 VPNs for Firefox

  1. Firefox browser extension with loads of extra features
  2. Pretty fast speeds
  3. Blocks WebRTC leaks
  4. Works with Netflix
  5. VPN servers in 58 countries
  6. Minimal logging
  1. Speeds fall behind our top picks
  2. No live chat
  • Best Price

    $4.08/mo over 12 Months

    See all plans

  • Top Speedi

    63Mbps same city speed

    Based on a 100Mbps test connection

  • Servers

    58 countries

  • Compatible with

    • Windows logoWindows
    • Mac logoMac
    • iOS logoiOS
    • Android logoAndroid
    • Linux logoLinux

The Bottom Line

Windscribe’s recent update to its range of browser extensions makes it a strong contender for the best VPN for Firefox.

The browser extension for Firefox has more extra features than any other we’ve seen; WebRTC leak blocking; an ad, tracker, and malware blocker; and the ability to easily change your GPS location and browser time to match your proxy location.

Like NordVPN’s browser extension, Windscribe encrypts browser traffic, but traffic outside the browser will still use your real IP.

Windscribe has plans to enable remote control of the desktop app through the browser extension in the near future, much like ExpressVPN’s browser extension does currently.

So, why isn’t Windscribe at the top of our list?

Firstly, the speeds don’t quite match those of our top VPN picks (though they’re by no means slow).

Then there’s the lack of live chat support. You can talk to ‘Garry’, Windscribe’s live chat bot, but it doesn’t always understand your questions, meaning that you have to resort to email support, which can be a little slow at times.

Nevertheless, Windscribe’s new and improved browser extension makes it one of the very best VPNs for Firefox users.

For a more in-depth look, read our full Windscribe review.

4. Private Internet Access

Ranked #4 out of 74 VPNs for Firefox

  1. Handy proxy extension for Firefox
  2. WebRTC leak blocking
  3. One of the fastest VPNs available
  4. Works with Netflix
  5. Strict no-logs policy
  1. VPN servers in just 32 countries
  2. Live chat feature available intermittently
  • Best Price

    $3.33/mo over 12 Months

    See all plans

  • Top Speedi

    89Mbps same city speed

    Based on a 100Mbps test connection

  • Servers

    32 countries, 3,300+ servers

  • Compatible with

    • Windows logoWindows
    • Mac logoMac
    • iOS logoiOS
    • Android logoAndroid
    • Linux logoLinux

The Bottom Line

Private Internet Access (PIA) is a super fast and safe VPN for Firefox user.

Like NordVPN and Windscribe, the proxy extension encrypts browser traffic but doesn’t protect any other apps.

However, you can use the desktop app and browser extension at the same time for ultimate protection.

PIA maintains a no-logs policy for your privacy and is one of the fastest VPNs on the market. The Firefox browser add-on also blocks WebRTC leaks.

But if access to global content is your goal, PIA might not be for you. It covers popular countries – 32 in total – but misses many of the locations that ExpressVPN and NordVPN have servers in.

Live chat support is only available during certain hours, so if you run into any issues outside of the specific times you’ll have to wait a little longer for a reply to email support.

Despite these small hangups, PIA is still a solid choice for Firefox users who want the best speeds.

For a more in-depth look, read our full Private Internet Access review.

5. Surfshark

Ranked #5 out of 74 VPNs for Firefox

  1. Secure Firefox proxy extension
  2. Above-average VPN speeds
  3. Works with Netflix and iPlayer
  4. VPN servers in 61 countries
  5. Strict no-logs policy
  1. Speeds fall behind our top picks
  2. Browser extension doesn't block WebRTC
  • Best Price

    $1.99/mo over 24 Months

    See all plans

  • Top Speedi

    76Mbps same city speed

    Based on a 100Mbps test connection

  • Servers

    61 countries

  • Compatible with

    • Windows logoWindows
    • Mac logoMac
    • iOS logoiOS
    • Android logoAndroid
    • Linux logoLinux

The Bottom Line

Surfshark is a fairly new no-logs VPN but it shows a lot of promise – its secure Firefox proxy extension is a welcome bonus.

It offers Firefox users a ‘CleanWeb’ tool which aims to block ads, trackers, and malware.

Even more reassuringly, Cure53’s recent independent audit of the extension proves its high level of security.

Unfortunately, Surfshark’s browser extensions do not automatically block WebRTC requests, so you’ll have to disable it manually from within Firefox’s settings.

Surfshark’s speeds aren’t quite as good as our top VPN recommendations, but they’ll be quick enough for the average browser user.

We hope to see more improvements from Surfshark, like integrated WebRTC blocking, as it continues to establish itself in the VPN market.

For a more in-depth look, read our full Surfshark review.

Popular Questions

Why Should You Use a VPN for Firefox?

Screenshot of the Firefox download page

While Firefox has a reputation for being a more privacy-friendly alternative to Google Chrome, using it doesn’t truly protect your personal data from snooping or malicious third parties.

Even when you use Private Browsing, which erases your browsing information like passwords, cookies, and history locally (a bit like Chrome’s Incognito mode), your ISP and any eavesdroppers sniffing your traffic can see what you do online.

Here’s a warning on Firefox’s website:

Screenshot of Firefox's Private Browsing warning

That’s why you should still use a VPN when you use Firefox Private Browsing.

VPNs encrypt all internet traffic flowing through your device and mask your IP address with a new IP address belonging to the VPN server.

This ensures that your online activities remain private.

But that’s not the only reason you should use a VPN with Firefox.

VPNs also allow you to access restricted content – whether it’s your school, library, or government that has imposed the blocks.

If you use a VPN app on your desktop computer then there’s no immediate need to install a browser extension as your browser traffic will go through the encrypted VPN tunnel.

But there are still some benefits to using an extension.

Browser extensions often come with extra features such as ad and malware blockers, as well as WebRTC leak protection. These are sometimes missing on the main VPN apps.

Using a browsing extension is a lightweight alternative to using a device-wide VPN, so you may experience better browsing speeds.

If you’re a heavy browser user and you only want to protect browser traffic, a VPN add-on for Firefox may be a good solution for you.

What Is WebRTC?

WebRTC is a browser 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. You can read all about them in our leaks guide.

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

However, you can disable WebRTC manually within Firefox’s settings – unlike Chrome – just to be sure.

  1. Enter about:config in the address bar and hit enter.
  2. Click I accept the risk!.
    Screenshot of Firefox config warning
  3. Enter media.peerconnection.enabled on the search bar and hit enter.
  4. Right-click on the line listed and select Toggle.

When the Value reads false WebRTC is disabled.

How Do You Set up and Enable a VPN for Firefox?

It’s really easy to set up a VPN for Firefox.

You’ll need a verified VPN subscription to start with. Once you’ve paid, just visit your VPN provider’s website and download the custom app for your device.

After clicking through the installation wizard, log in with your credentials.

Before you switch on the VPN you should take a look at the settings menu in order to make the connection as secure and private as possible.

Be sure to enable the VPN kill switch and IP/DNS leak protection to prevent your personal data from being exposed, and choose OpenVPN as the VPN protocol (if you can).

You can read more about VPN protocols and encryption in our separate guide.

Now you’re ready to connect to the server location of your choice.

Once connected to the VPN, all of your internet traffic, including Firefox browsing traffic, will be encrypted and protected.

If your VPN service provider doesn’t have a custom app for your device you’ll need to configure it manually.

You can find out how to do that in these installation guides:

If you’d like to use a VPN browser extension for Firefox, read on for more details on how to set it up.

How Do You Add a VPN Extension to Firefox?

If you’d like to use a browser extension to encrypt your browser traffic it’s as simple as finding the VPN on the Firefox Add-ons website – click through from your VPN service provider’s website to avoid downloading the wrong (potentially malicious) one – and clicking ‘Add to Firefox’.

Screenshot of the Firefox browser add-ons page for NordVPN

Once you’ve added the extension, you’ll be able to choose the server location and connect from within your browser.

Some VPN browser extensions, like ExpressVPN’s, require you to use the browser extension in conjunction with the desktop app.

If that’s the case, follow the setup instructions listed under How Do You Set up and Enable a VPN for Firefox? above.

Does Firefox Have a Built-in VPN?

Screenshot of Firefox Private Network website

No, Firefox doesn’t have a built-in VPN.

However, Firefox is currently beta testing a proxy extension called Firefox Private Network that will encrypt all your browser traffic and mask your IP address using Cloudflare proxy servers.

Currently the extension is only available for users in the US.

This shows Mozila’s commitment to improving its privacy offering, but we’d still recommend buying a VPN service to stay safe online as Firefox’s proxy only protects browser traffic.

What’s the Best Free VPN for Firefox?

You now know that it’s important to protect your Firefox traffic using a VPN – and in some cases with an encrypted proxy browser extension – but all the ones we’ve recommended require a subscription.

Can you use a VPN for free with Firefox?

You can indeed.

But many free VPNs, and browser extensions in particular, aren’t safe to use.

To avoid the dangerous free VPNs that take advantage of your personal data, take a look at our guide to the best free VPNs.

All of those free VPN services are safe, secure, and work on Windows, MacOS, iOS, and Android. Just connect to a server to encrypt all of your Firefox traffic.

Like all good free VPN services, they do come with some limits, such as reduced server locations and restricted data usage.

If you’re looking for a browser extension to protect just your browser traffic, we recommend Windscribe.

As well as the premium service, Windscribe also has a free service, which comes with the full-featured Firefox browser extension.

You’ll be limited to 10GB a month, but that should be enough for light browsing.

Which VPNs for Firefox Should You Avoid?

Speaking of free VPNs, here are two Firefox VPNs you should absolutely avoid:

  • Hola VPN
  • Hoxx VPN

These so-called VPNs are actually proxies that simply spoof your IP address.

While this may work to access some blocked content, it’s not at all private.

In fact, these two proxy services may do more harm to your online privacy than good.

Hola works as a peer-to-peer network, essentially throwing your true IP address into a pool for other users to use and abuse as they please.

It doesn’t encrypt your internet traffic, and keeps logs of everything you do online.

Hoxx VPN claims to encrypt your browser traffic, but like Hola it collects information about the pages you’ve viewed through the proxy as well as your true IP address.

There are many other dodgy free VPNs and browser extensions available, but if you stick with our recommendations you’ll be safe.

What’s the Difference Between a Browser Add-On and a VPN?

Screenshot of ExpressVPN's Firefox extension

VPN device apps and VPN browser extensions (or add-ons) aren’t the same.

While a VPN sends all device internet traffic through an encrypted VPN tunnel, browser extensions are proxies that spoof the IP address associated with your browsing traffic.

Some browser add-ons encrypt traffic – these are called HTTPS proxies – but most don’t (they’re just HTTP instead).

That’s why we always recommend using a VPN desktop app over a browser extension for the best levels of privacy and security.

You can read more about the difference between VPNs and proxies in our separate guide.

If you do want to use a proxy instead of a VPN client, we’d recommend using a browser extension provided by a trusted VPN service.

If you don’t, you risk putting all your personal data into the wrong (and sometimes dangerous) hands.

How Do You Unblock a Website on Firefox?

It’s easy to unblock websites on Firefox if you use a VPN.

Once you’ve set up your VPN app or browser extension just connect to a server location where the content isn’t restricted and you’ll evade the block with ease.

If it’s streaming content you’re after, it may be a little trickier as popular services like Netflix, Hulu, and BBC iPlayer actively block VPN traffic.

If you need a VPN for watching your favorite shows, make sure to choose one from our list of the best VPNs for streaming.

Can You Be Tracked If You Use a VPN for Firefox?

Yes, you can be tracked even if you use a VPN for Firefox.

While VPNs encrypt your traffic and mask your true IP address, which prevents some forms of tracking, websites and advertisers still have tools that can monitor your online activities:

  • Cookies
  • Tracking pixels
  • Web beacons
  • Browser fingerprinting
  • Advertiser IDs

Firefox has a Content Blocking feature that can block many trackers – but crucially, not all of them.

Some VPN browser extensions also come with ad and tracker blockers, but even then big tech companies can still track your online activities.

When you log into online accounts such as Google you can be sure that you’re being tracked.

Google logs your searches and makes money from selling it to advertisers.

If you want to avoid being tracked online (as much as you possibly can) use a VPN, tracker/cookie blockers, and stay logged out of accounts that are provided by tech giants.

You can read more about online tracking on the EFF website.

Is Firefox Browser Private?

Firefox is generally considered a more private alternative to Google Chrome, but is it really?

Well, to start with, it’s open-source, which is a plus for transparency. Chrome is based on open-source components, but isn’t open-source itself.

According to Mozilla’s privacy policy it doesn’t collect your browsing history, unless you opt in. When you log into your Google account it collects loads of information about your online activities.

Firefox also has Private Browsing mode which, like Incognito mode, erases your browsing information locally (i.e. on your personal computer).

Firefox allows users to tailor the Content Blocking feature to block some or all known trackers/cookies/fingerprinters, which is a great for privacy.

Screenshot of Firefox content blocking settings

But even with these extra privacy features, you still need to use a VPN with Firefox as your ISP can still monitor you online and hackers can take advantage of your personal data.

Unlike Chrome, Firefox allows you to disable WebRTC within the settings so that you can avoid any leaks while using a VPN.

For those who are really serious about privacy, there are even more private web browsers available. Read on to know more.

Is Firefox the Same as Tor?

No, Mozilla Firefox and Tor are separate web browsers.

However, the Tor browser is a modified version of the Firefox browser.

screenshot of the tor browser.

Tor is free and open-source, and it works by routing users’ traffic through a worldwide network of volunteer nodes. This helps to conceal the user’s location and online activities from snoopers.

Tor is used by journalists, activists, and campaigners in restrictive regimes to protect themselves from persecution when speaking out against the government.

It’s also home to the deep and dark web, which can be used as a platform for selling and buying illicit substances and content.

You can read more about the differences between VPNs and Tor in our comprehensive guide.

Alternative Web Browsers to Firefox

Firefox has some great privacy features but there are a couple of web browsers that go even further to protect your online identity:

These browsers default to private browsing so that you don’t have to even think about it. They include loads of extra features that make sure you have the most private browsing experience possible.

There’s no point in using a private web browser and a VPN if you still use Google for all of your searches.

Use a privacy-focused search engine like DuckDuckGo instead.

About the Author

  • Simon Migliano Head of Research at Top10VPN

    Simon Migliano

    Simon leads our investigations into VPN safety and digital privacy. His work has been featured on the BBC, CNet, Wired and The Financial Times. Read full bio