A quick search on the Mozilla add-ons store for "VPN extensions" returns hundreds of results. But it's hard to tell which VPN extensions actually work and keep you safe online.

So we tested several VPN services and found the best VPN extensions to use with Mozilla Firefox—considering speed, security, performance, and customer support, and ensuring that each of the recommended services are quick, safe, and easy to use.

Note: The includes both free and paid options; however, we'd recommend a premium extension if you want to access geo-restricted content without compromising on your security and privacy. This is because most free VPN extensions log user activity and share personal information with advertisers, government agencies, and even hackers to keep their business afloat.

What Is the Best VPN Extension for Firefox?

The services we'll be covering are:

Let's investigate why these are the best VPNs for anyone using the Mozilla Firefox browser.

ExpressVPN

ExpressVPN tops the list for the best Firefox VPN extension as it offers excellent security and lightning-fast connection speeds. It has over 3,000 servers in 94 countries.

While using the Firefox browser extension, we were able to connect to a server location of our own choice and stream a favorite series in HD without buffering.

ExpressVPN-Netflix
Money Heist on Netflix with ExpressVPN

You can connect up to five devices simultaneously, including smartphones, Chromebooks, and iPads. You can easily download the ExpressVPN extension on Firefox and start surfing the web anonymously.

ExpressVPN offers 256-bit AES encryption, which is the best-in-class encryption to date. It also provides additional security features like a Network Lock Kill Switch and DNS leak protection to hide your real identity.

Related: What Is a VPN Kill Switch? Here's Why You Need One

Adding the Firefox browser extension is simple and takes only a few seconds. Simply go to the browser add-ons page, search for "ExpressVPN", and click Add to Firefox.

ExpressVPN

Once added, click on the Power button to automatically connect to the fastest server or manually choose a server from the list. We used both methods and had no issues securing Firefox browser traffic. You can try ExpressVPN using its 30-day money-back guarantee, and if you don't like the service, you can ask for a refund.

BUY NOW: EXPRESS VPN

NordVPN

NordVPN-interface
https://addons.cdn.mozilla.net/user-media/previews/thumbs/217/217770.jpg?modified=1622132826

NordVPN is another strong contender on this list, with 5,500+ servers in 59 countries. Its Firefox browser extension works alone, i.e. without using the VPN app, and offers good speeds and world-class security features.

NordVPN encrypts your traffic using the industry-standard 256-bit encryption and prevents malware and other threat using the CyberSec feature.

If you're looking to stream, you'll be glad to know that NordVPN works with popular streaming platforms like Netflix, Amazon Prime Video, HBO, and Hulu.

The VPN extension is also ideal for privacy-conscious users. It has a strict zero log policy and a smart kill-switch to ensure that your IP is never revealed. Additionally, NordVPN blocks WebRTC leaks and offers a useful Adblocker that protects you from malware, phishing, and other threats.

Related: The Best VPNs With a Free Trial Period

You can connect up to six devices at once using a single NordVPN license. If you switch between Firefox and Chrome, you'd be pleased that NordVPN also offers a Chrome extension.

You can get full access to all NordVPN features risk-free using its 30-day money-back guarantee. You can always ask for a refund during the trial period if you feel it isn't the right option for you.

BUY NOW: NORDVPN

HotSpot Shield

HotSpot Shield is a premium VPN that offers both a free and a paid extension for the Mozilla Firefox browser.

The extension is easy to use as it doesn't require registration or signing up for the service. All you need to do is install the extension in Firefox and connect to the service with a single click.

The free version is location-limited and allows you to connect only to the US server. This may result in sluggish connections during peak hours due to server overcrowding. If you want to access all 1,800+ servers along with cloud-based malware protection and more, you will need to upgrade to the premium version of HotSpot Shield.

We were impressed by the variety of security features offered in both the paid and free HotSpot Shield extensions. It offers cookies and adblocker as well as WebRTC protection to prevent unwanted IP leaks. You can find these features in the configuration menu and customize them to your personal security preferences.

Unfortunately, the adblocker in the free version didn't work as expected as we kept getting annoying ads on YouTube. For more reliable performance, we recommend using the premium HotSpot Shield extension.

Private Internet Access

Private Internet Access, or PIA, offers a vast network of over 29,000 servers in more than 75 locations. As PIA's name suggests, security and privacy are at the heart of its operations.

PIA offers good speeds across all its servers. We could stream movies on Netflix and BBC iPlayer without lags, but had no luck with Amazon Prime Video. APV could easily detect PIA and notified us when we tried to access geo-blocked content.

Prime-Video-with-PIA

PIA offers a kill switch that automatically disconnects you from the internet in case you lose the VPN connection. It also provides DNS leak protection, so you don't have to worry about your identity being exposed as you browse the web.

Although PIA is a member state of the Five-Eyes Alliance, it has a proven zero-log policy, which means your personal data won't be shared with anyone. It also offers a 30-day money-back guarantee, so you can use the service completely risk-free.

Related: What Is "Five Eyes" Surveillance? VPN Users, Beware!

TunnelBear

TunnelBear offers a user-friendly Firefox browser extension. You can download it from the Firefox add-ons store, create an account, and connect to a server in a location of your choice.

Although TunnelBear doesn't have as many security features as its competitors on this list, it does enough to protect your data and keep your location anonymous. It uses a Vigilant Mode, which is basically a kill switch, to block unsecured traffic in case the VPN connection fails.

Similar to other services on the list, TunnelBear also offers IP and DNS leak protection. We ran several tests and couldn't detect any DNS or IP address leaks.

DNS-Leak-Test-TunnelBear

TunnelBear also offers a free Firefox VPN extension, but it limits you to 500MB of data per month. The free extension can be an excellent option for casual browsing and data protection, but for unlimited safe browsing and streaming without any data caps, we recommend the premium TunnelBear VPN extension.

Get the Best Firefox VPN Extension

Firefox security features aren't strong enough to ensure anonymity and security on their own. Using the VPN extensions on this list allows you to stream geo-restricted content without worrying about your security and privacy.

All these VPN extensions offer lightning-fast speeds and unlimited data and bandwidth. They also use military-grade encryption and offer protection against DNS leaks to keep you safe online.