[mschuster91]

> - install encryption certificates that are actually less trustworthy than Mozilla's, hence decreasing the security of https;

Given that in many industries insurances and, in some cases like banking, the law requires companies to monitor HTTPS traffic of browsers for compliance, it might be better if browsers had a dedicated filter / monitor API.

[Yoric]

WebExtensions definitely have such an API. That's how AdBlock, uBlock, etc. work.