The 'Potential security risk ahead' error is most commonly encountered in Firefox-based browsers like Mozilla Firefox, PaleMoon, Waterfox and such.
(I am going by the button in Adguard that says 'Firefox-based browsers ignore system certificates and their own certificate storage. Tap to install certificate into the browser', which is what I originally used to install it into Firefox.) I don't see any way to manage certificates in Firefox on Android, although I know how on desktop. AdGuard extension for Firefox AdGuard AdBlocker effectively blocks all types of advertising on all web pages, even on Facebook.com, Youtube.com, and others! Use another browser? AdGuard download has started! Click the button indicated by the arrow to start the installation. Thank you for choosing AdGuard! Select 'Open' and click 'OK', then wait for the file to be downloaded. In the opened window, drag the AdGuard icon to the 'Applications' folder. Thank you for choosing AdGuard! 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.
So yeah I got tired of seeing earwax removal ads while I studied so I went to get an adblock. On the Mac app store I searched a bit and it looks like adguard is the best one in reviews.
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:
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.
Adguard Firefox Plugin
6) Select Authorities tab.
7) Click Import....
8) Browse the downloaded cert.cer file and click Open.
9) Click OK.
You've successfully installed AdGuard certificate. Restart the browser and the error should go away.
Adguard Firefox Extension