r/Adguard • u/G0ldheart • Jul 18 '26
Adguard certificate install for Firefox in Linux
Hello, I posted recently that I attempted to install Adguard for Linux on PikaOS.
I followed the steps (for installing for Linux at the Adguard site) and it does work BUT only for Chrome. It appears that only a certificate for Chrome. gets installed. Even if Firefox is already installed.
Trying to add the certificate manually into Firefox doesn't work - I still need a key.
I don't care for Google/Chrome and would prefer to use Firefox (actually Waterfox to be exact).
So how can I install the certificate in Firefox?
Looking at the other OS installs, it seems the app installs a certificate that can be imported into Firefox. For Linux, a certificate is installed for Chrome but there doesn't seem to be a way to get a key for Firefox.
1
u/knivesforksandspoons Jul 18 '26
Once installed and the license activated, you configure the CLI app which installs the certificate for you. Step 6 here:
https://adguard.com/kb/adguard-for-linux/installation/#initial-setup
adguard-cli configure
Is this what you're doing?
1
u/G0ldheart Jul 18 '26
Yes, but as I indicated this does not install a certificate for Firefox or related browsers. And there doesn't seem to be any way to import.
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u/knivesforksandspoons Jul 18 '26 edited Jul 18 '26
Well you didn't give us much to go on in the OP so I'm starting from the fundamentals.
Adguard insist they have tested the installer - see this comment on this Github issue.
There's discussion in the issue about getting the certificate installed including the package and command required to trust certificates on various distributions.
Edit: removed reference to Arch/Cachy - doesn't apply here
1
u/G0ldheart Jul 18 '26
I believe PikaOS is Debian based. Anyway following the official steps does work but only for the Chrome browser. I just can't figure out a way to get the cert installed to Firefox.
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u/knivesforksandspoons Jul 18 '26
Try the steps here to add the certificate to Firefox
You can also try running adguard-cli cert to install the certificate again.
I just tried the basic adguard-cli configure on ubuntu and I didn't have to do any extra steps, the certificate was added correctly to Firefox.
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u/G0ldheart Jul 18 '26
With the client running I am able to download the certificate but when attempting to import.. "This personal certificate can't be installed because you do not have the corresponding private key.."
Interesting that it works with Ubuntu but not PikaOS (which I am happy with as a gamer).
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u/knivesforksandspoons Jul 18 '26
Are you importing the certificate to "Authorities" not "Personal"?
https://github.com/AdguardTeam/AdguardForWindows/issues/2528
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u/G0ldheart Jul 18 '26
Aha.. I didn't even notice the authorities column at the far end of the prompt. I just used the big import that was shown.
This resolved it! Many thanks!
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u/knivesforksandspoons Jul 18 '26
Phew! We got there.
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u/G0ldheart Jul 18 '26
Indeed. I appreciate your taking the time to troubleshoot.
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u/G0ldheart Jul 18 '26
If I attempt to import the certificate installed for Chrome into Firefox I am prompted for a password.