When a browser grabs a webpage over HTTPS, *nobody* (aside from revelations that governments can see our SSL traffic) can see what’s happening between your browser and the target webserver. You are protected against the prying eyes of an evil network admin, proxy admin or even government.
Please run the tests on https://bloat.io/mm/, it looks *very* rudimentary, but I am gathering some information from different browsers. Let the page load for a few seconds, and everything gets logged in a database. As a “visual”, the more “warning icons” you see, the more vulnerable your browser is.
Don’t worry, it won’t try to exploit anything or crash.