A major vulnerability in Firefox is WebRTC (Web Real-Time Communication). Even when using a proxy, your real IP address can leak via WebRTC. The "verified" version of 1ClickVPN includes a built-in WebRTC blocker, ensuring that websites only see the VPN’s IP address, not your ISP’s.
You should only install 1clickVPN if it appears on the official Mozilla Add-ons site with a "Recommended" 1clickvpn firefox verified
Given the serious concerns surrounding 1ClickVPN, users seeking a secure and reliable VPN for Firefox would be well-advised to consider other options. Here are some of the best, as rated by top industry publications for 2026. A major vulnerability in Firefox is WebRTC (Web
| Extension | Verified by Mozilla? | No-Logs Audited? | Cost | |-----------|---------------------|------------------|------| | | Yes | Yes (by Securitum) | Free / Paid | | Windscribe | Yes | Yes (by Cure53) | Free (10GB) / Paid | | Mullvad (via SOCKS5) | N/A (full app + manual config) | Yes (by Assured) | Paid | You should only install 1clickVPN if it appears
A common myth is that browser VPNs are slow. We tested the extension across three server locations: US East, Europe (Frankfurt), and Asia (Singapore).
According to its official description, 1ClickVPN is designed to offer a straightforward solution. It requires no account creation, as it is a free VPN without registration, credit cards, and advertisements. The extension aims to unlock "all fringes of web browsing without any restriction absolutely secured and anonymously as well as unblock any website".