https://bugs.kde.org/show_bug.cgi?id=452095
--- Comment #6 from ferdymercury <fernando.hu...@uv.es> --- In my case, with flatpak, I was getting also the error that no certificate was found. Even if the default folder of mozilla was being found (when checking Configure Backends, PDF, the path was correct). And in Firefox itself, about:certificate showed the certificate. What I did was to change the path to ~/.pki/nssdb, and then it worked. So either Okular was not able to access .mozilla/profile/nssdb due to some weird permissions (even if I activated everything with flatseal), or Firefox was relying on a non-default position of the nssdb certificates being store in .pki instead of within the Firefox profile. -- You are receiving this mail because: You are the assignee for the bug.