Most commonly when fixing certificate errors! A lot of modern web applications have all of their certificate configuration in the web interface... which you can't access when your certificate breaks. I think once I had to break out IE11 to fix a certificate because Firefox wouldn't let me...
But also sometimes I need to access a website where the certificate lapsed yesterday. This is not a security issue and no reasonable person would assume a certificate expired yesterday is compromised, but we are living in a world of madness. I am not going to wait for some third party to fix their site, I'm just going to circumvent HSTS, I have better things to do.
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Most commonly when fixing certificate errors! A lot of modern web applications have all of their certificate configuration in the web interface... which you can't access when your certificate breaks. I think once I had to break out IE11 to fix a certificate because Firefox wouldn't let me...
But also sometimes I need to access a website where the certificate lapsed yesterday. This is not a security issue and no reasonable person would assume a certificate expired yesterday is compromised, but we are living in a world of madness. I am not going to wait for some third party to fix their site, I'm just going to circumvent HSTS, I have better things to do.