You can revoke your trust in any CA at any time, you don't even need to see any errors! Just click the little padlock each time you visit a secure website and see if the CA is in your good books. If it's not, pretend the padlock isn't there!
OK, that's a little awkward. A browser extension could automate this. But in practice, nobody wants to do this, because hardly anyone has opinions on particular CAs. It's a sort of meta-opinion - some people feel strongly they should be able to feel strongly about CAs, but hardly anyone actually does. So nobody uses such browser extensions.
OK, that's a little awkward. A browser extension could automate this. But in practice, nobody wants to do this, because hardly anyone has opinions on particular CAs. It's a sort of meta-opinion - some people feel strongly they should be able to feel strongly about CAs, but hardly anyone actually does. So nobody uses such browser extensions.