that isn't censorship, that's society exercising it's freedom of speech to tell you that your views aren't worth hearing.

You're wrong, and this view among perpetually offended left wingers is more than mildly disturbing. When taken to the point where the CEO of a major internet company can be forced out of his job because he donated money (privately) to a proposition against gay marriage, that is shutting down opposing views and using intimidation to do so.

The Mozilla example is hardly the most disturbing, as anyone who is aware of what is going on in American university campuses today knows. Quite recently a student at Colorado College was suspended for TWO YEARS and banned from transferring credits from any other university back after that time (essentially expelling him from the university) for making a six word joke on Yik Yak (https://www.thefire.org/colorado-college-suspends-student-for-two-years-for-six-word-joke-on-yik-yak/).

But surely his joke was a threat of violence or harassing a specific student, right? His crime was responding to a post of "#blackwomenmatter" with "They matter, they’re just not hot."

If you think this is an isolated incident, try publicly disagreeing with the #BlackLivesMatter thugs on any major American university campus today and see how long it takes before you're publicly berated, fired from your job, or physically assaulted by students and members of the faculty (as happened to an Asian student journalist who was pro-BLM trying to cover protests in the public university quad who was assaulted and threatened by members of the faculty and gangs of rich racist students behind "BlackLivesMatter.")