I assume they’re referring to the CA/B Baseline Requirements, which the browser vendors take extremely seriously. https://cabforum.org/baseline-requirements-do

I assume they’re referring to the CA/B Baseline Requirements, which the browser vendors take extremely seriously. https://cabforum.org/baseline-requirements-documents/ https://cabforum.org/baseline-requirements-documents/ But the OP webpage is so terrible that I’m really not sure what they’re talking about.