How do I update certificates when one has expired? In Firefox on both 14.4 AND Windows 8.1 I am getting a lot of certificate errors- either expired or do not recognize the name on certificate. By far this happens on 14.4 much more. Although I can sometimes add them to exceptions this is not always true (and I would rather it worked properly anyway). I know from reading some other responses here that Firefox segregates certificates by user, but I am the only user on this machine. Any suggestions?


To update all certificates do:

    sudo update-ca-certificates -f

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