Unable to add a Certificate

[HiperDoo]

Expected behavior

I am unable to correctly install a root.crt certificate to access without disturbing warnings my homelab web pages (which are not publicly accessible). This is a problem I have seen in some forums and also in this repository and I do not see an obvious and correct solution.

The only "solution" is to set False the configuration security.nocertdb (which is not of the best ideas).

Similar questions: https://github.com/mullvad/mullvad-browser/issues/76 https://github.com/mullvad/mullvad-browser/issues/463

Edit: My settings of this browser are made declaratively from the file "policies.json", it would be very convenient if it were possible to install the certificate by declaring it from there.

Actual behavior

When you install a certificate from "Settings > Privacy & Security > View Certificates > Authorities > Import...," the approved certificate is NOT included in the certificate list. When making the same action having security.nocertdb in false, the certificate appears on the list.

Steps to reproduce

1. Open browser
2. Click on [specific element]
3. Observe [issue]

Issue reproducibility

Always reproducible

When did this start?

No response

Does it work in latest Firefox ESR?

I don't know

Browser version

Mullvad MullvadBrowser 140.4.0esr

Installation mode

System install (using an installer or a package manager)

Operating system

Unsupported OS (please specify below)

Other OS

NixOS 25.05

Profile testing

Issue occurs with a fresh browser profile

VPN Status

Not using any VPN

Additional Information

No response