The process of rating VPN browser extensions is different to the one we use for full VPN applications.
While a full VPN app may stream US Netflix easily, its browser extension may not be as effective.
Furthermore, encryption may be different, and there could be other restrictions and subtle differences 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.
Essentially, we use our own unique rating system to test and evaluate Firefox VPN add-ons.
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 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.
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.