Best VPN for Firefox in 2026
Updated 30 April 2026- Fast & secure servers in USA, UK, Canada & 100+ countries
- Keep your online activity private from your ISP & advertisers
- Use your favorite apps & services securely from anywhere
ExpressVPN Ultra fast & secure. Great for privacy, downloads, and everyday browsing on all your devices. 24/7 live chat support.
ExpressVPN Ultra fast & secure. Great for privacy, downloads, and everyday browsing on all your devices. 24/7 live chat support.
IPVanish Fast speeds with unlimited device connections. Strong no-logs privacy and 24/7 live chat support. Great for families.
IPVanish Fast speeds with unlimited device connections. Strong no-logs privacy and 24/7 live chat support. Great for families.
Private Internet Access High-speed VPN with a large server network and advanced security settings. Ad blocker included and 24/7 live chat support.
Private Internet Access High-speed VPN with a large server network and advanced security settings. Ad blocker included and 24/7 live chat support.
CyberGhost Fast speeds and strong privacy tools. Simple apps, automatic WiFi protection, and 24/7 live chat support.
CyberGhost Fast speeds and strong privacy tools. Simple apps, automatic WiFi protection, and 24/7 live chat support.
Proton VPN Swiss-based VPN with strong privacy focus. Audited no-logs policy and open-source apps. Great for privacy-conscious users.
Proton VPN Swiss-based VPN with strong privacy focus. Audited no-logs policy and open-source apps. Great for privacy-conscious users.
TotalVPN Affordable VPN with strong privacy and reliable speeds. Easy-to-use apps for all major devices. No-logs policy.
TotalVPN Affordable VPN with strong privacy and reliable speeds. Easy-to-use apps for all major devices. No-logs policy.
Surfshark Unlimited device connections at a budget-friendly price. Includes ad blocker and strong privacy tools. Great value for money.
Surfshark Unlimited device connections at a budget-friendly price. Includes ad blocker and strong privacy tools. Great value for money.
NordVPN Excellent speeds with one of the largest server networks. Strong security features and easy-to-use apps. 24/7 live chat support.
NordVPN Excellent speeds with one of the largest server networks. Strong security features and easy-to-use apps. 24/7 live chat support.
Rankings are based on our independent testing methodology. We evaluate speed, privacy, security features, and value for money. We may earn affiliate commissions from links on this page, which helps fund our testing — this does not influence our rankings.
Our Top Choice
ExpressVPN Ultra fast & secure. Great for privacy, downloads, and everyday browsing on all your devices. 24/7 live chat support.
ExpressVPN Ultra fast & secure. Great for privacy, downloads, and everyday browsing on all your devices. 24/7 live chat support.
Why You Need a VPN Add-on for Firefox
Firefox is the browser of choice for privacy-conscious users, with built-in Enhanced Tracking Protection and Total Cookie Protection. A VPN add-on extends this privacy foundation by encrypting your traffic and masking your IP from every website you visit.
Complete Firefox Privacy
Firefox blocks third-party cookies and trackers by default, but your ISP still sees every site you visit. A VPN add-on encrypts all browser traffic and hides your IP, closing the biggest gap in Firefox's built-in privacy protections.
Eliminate WebRTC Leaks
Firefox's WebRTC implementation can expose your real IP address to websites even with a VPN active. The best Firefox VPN add-ons automatically disable WebRTC leaks without affecting video calling functionality in services like Zoom or Google Meet.
Fast, Private Web Browsing
Enjoy fast, encrypted connections for web-based streaming services, news sites, and social media directly in Firefox. VPN add-ons keep your browser traffic private without slowing your day-to-day browsing.
Pair with Firefox Containers
Firefox's Multi-Account Containers let you isolate browsing contexts. Pair this with a VPN add-on to use different VPN settings in different containers — keeping work and personal browsing fully separated and encrypted.
What to Look for in a Firefox VPN Add-on
Firefox's privacy-first architecture creates opportunities for deeper VPN integration than other browsers. Here is what matters:
HTTPS Proxy Encryption
The best Firefox VPN add-ons use HTTPS proxy tunnels (not SOCKS5) for genuine encryption. NordVPN and Surfshark Firefox extensions use TLS 1.3 encryption, matching the security of their desktop apps for browser traffic.
Container Integration
Some VPN add-ons support Firefox Multi-Account Containers, allowing per-container VPN locations. This means you can route work browsing through one country and personal browsing through another, simultaneously.
Lightweight Performance
Firefox VPN add-ons should add minimal memory overhead (under 50 MB) and less than 100ms to page load times. Well-optimized add-ons from NordVPN and ExpressVPN consume 20-30 MB — barely noticeable alongside regular browsing.
Selective Tunneling
Allowlist specific websites to exclude them from the VPN tunnel for banking, local news, or corporate intranets. This prevents login issues on sites that flag VPN IP addresses while keeping everything else encrypted.
How to Set Up a VPN Add-on in Firefox
Visit Firefox Add-ons
Navigate to addons.mozilla.org and search for your VPN provider (NordVPN, ExpressVPN, or Surfshark). Only install add-ons from verified publishers listed on the official Mozilla Add-ons site.
Install the add-on
Click “Add to Firefox” and review the requested permissions. Reputable VPN add-ons require minimal permissions — reject any that ask for browsing history access.
Sign in to your account
Click the VPN icon in your Firefox toolbar and log in with your credentials. The add-on requires an active VPN subscription to function.
Select a server and connect
Choose your desired server location and click Connect. Your browser traffic is now encrypted through the VPN tunnel. The toolbar icon will indicate an active connection.
Configure privacy settings
Enable WebRTC leak blocking in the add-on settings. For advanced privacy, pair the add-on with Firefox Multi-Account Containers to isolate different browsing contexts.
How We Test VPN Firefox Add-ons
We test every Firefox VPN add-on on the latest Firefox release (Stable and ESR) across Windows, macOS, and Linux.
Leak Protection Verification
We test for WebRTC, DNS, and IP leaks using browserleaks.com, ipleak.net, and our own test pages. Firefox-specific WebRTC behavior is tested separately as it differs from Chromium browsers.
Page Load Performance
We measure page load times on 50 popular websites with the add-on active vs. inactive. Top Firefox VPN add-ons add less than 80ms average overhead, compared to 200ms+ for poorly optimized ones.
Privacy Practices Audit
We review each add-on's permissions, data collection practices, and Mozilla Add-ons store reviews. We verify that no add-on injects scripts, collects browsing data, or phones home to analytics servers.
Container Compatibility
We test VPN add-on behavior with Firefox Multi-Account Containers, testing whether VPN state persists correctly across containers and whether per-container location selection works reliably.
All Firefox add-on tests are re-run monthly on the latest Firefox Stable and ESR releases.
Frequently Asked Questions
Is a VPN extension as secure as a full VPN app?
No. A Firefox VPN add-on encrypts only browser traffic, leaving other applications unprotected. For full-device encryption, use the desktop VPN app alongside the extension. The add-on is best for quick browser-level protection on shared or public computers.
Does a VPN extension protect all browser traffic?
Yes, within Firefox. A properly built VPN add-on encrypts all traffic inside the browser — every tab, web app, and embedded media. NordVPN and Surfshark Firefox add-ons use TLS 1.3 encryption for genuine privacy, not just a simple proxy.
How do I fix WebRTC leaks in Firefox?
Firefox allows disabling WebRTC natively. Type about:config in the address bar, search for media.peerconnection.enabled, and set it to false. Alternatively, NordVPN, ExpressVPN, and Surfshark add-ons automatically block WebRTC leaks without manual configuration.
Can I use a free VPN extension for Firefox?
We recommend caution with free Firefox VPN add-ons. Many collect browsing data to fund their service. If you want a free option, Mozilla’s own Firefox VPN (paid) is trustworthy, or use Proton VPN’s free tier. Avoid unknown free add-ons that request excessive permissions.
Do VPN add-ons work with Firefox Multi-Account Containers?
Some do. NordVPN's Firefox add-on works alongside Multi-Account Containers, allowing you to isolate VPN-protected browsing in specific containers. This lets you keep work, banking, and personal browsing fully separated and encrypted in different containers — a unique Firefox advantage.