Permanently approve a self signed certify?


I have some servers which I connect to by webmin and other services at different ports.
The first time I get the warning and say to go on. If I quit and go again to those sites the warning appears again. Can I save the exception for those sites as in Safari and Firefox?
I have this settings now.



Being able to import a known good cert would be a great thing.

Or, if it could import from the system cache, on linux. Specifically Fedora.