Also available for Chrome and as a desktop application, AdGuard for Firefox can disable banners, block video, text and media ads, and remove unwanted popup windows on the websites you land on. AdGuard VPN for Firefox To join the beta test program and to get early access to new AdGuard VPN for Firefox features, open this link in Firefox browser.
The 'Potential security risk ahead' error is most commonly encountered in Firefox-based browsers like Mozilla Firefox, PaleMoon, Waterfox and such.
Starting with v68, under certain conditions Firefox normally trusts certificates from the system storage. However, sometimes for reasons outside of our control the trust mechanism faults, which leads to the 'Connection is untrusted' error. To fix it, it's necessary to download AdGuard certificate and install it to Firefox's local storage manually. To do so, follow these steps:
Firefox & Chrome. Firefox now supports DoH, we can manually enabling and disabling DNS-over-HTTPS at Preferences General Network Setting Enable DNS over HTTPS. Change to Custom in the Use Provider and set the query url to the one shown on AdGuard Home’s web interface under Setup guide.
This instruction is for Firefox browser. Names of buttons and menu items may differ in other Firefox-based browsers.
1) Run AdGuard.
2) Go to http://local.adguard.org/cert and click the Download button. The browser should start downloading cert.cer file.
You can also open the download page by clicking on the link via the AdGuard app at Settings - Network - HTTPS filtering.
3) Open your browser and then open Settings.
4) Go to Privacy & Security tab.
5) Scroll down to Certificates and click on the View Certificates button.
6) Select Authorities tab.
Different versions of Firefox browser require different approaches for AdGuard to perform HTTPS filtering. Most of the time this happens in Firefox versions older than v81.1.1. To solve this issue, try Method 1 described below (it works with nightly– and beta–versions of the browser). Enabling access to certificates installed on device. So, we’ve updated Scriptlets to v1.3.13 and Extended-CSS to v1.3.6. AdGuard Assistant has been updated to v4.3.37. Plus, we’ve added new translations and filters to this version. How to install beta: Chrome/Edge/Opera; Firefox; adguard-api.
Firefox Adguard Browser
7) Click Import....
Firefox Adguard Download
8) Browse the downloaded cert.cer file and click Open.
Firefox Adguard Assistant
9) Click OK.
Firefox Adguard Chrome
You've successfully installed AdGuard certificate. Restart the browser and the error should go away.