Devonthink Browser SSL add

I have a few websites which need a custom client-side SSL certificate for auth. Chrome accesses it through the login keychain stored on keychain access.

How can I enable this on DT’s inline browser? I’d like to view those websites that need the client-side SSL auth. Where can I configure / store the SSL certs for DT inline browser?

The WebKit uses the system’s keychain too, there’s no need or possibility to customize this. Are you able to view these websites using Safari or only via Chrome?

I use vivaldi currently. Maybe I should try safari?