Plugins that do mildly comical things have been around for awhie, but 2016 is the rise of the political browser plugins. While it didn't start with John Oliver, one of the first high profile plugins was Drumpfinator. While a fan of John Oliver, it was a one-note gag, and to me personally, wasn't that funny, but I appreciated commitment. There were a few others such as a browser plugin that replaces pictures of Trump with kittens, a plugin that attempts filter Trump mentions from any page, but that seemed to be the extent of it.
However, the rise of fake news spawned something far more interesting: injecting in-page fact-checking content. Slate created its This is Fake chrome extension that labels Fake news as such. Even more exciting and more resource intensive is Washington Post's RealDonaldContext which provides Washington Post's analysis on a per-tweet basis of Donald Trump tweet claims. This is something entirely new as far as I can think of as its an on-the-fly pro-active level of journalism that's responding to your interactions without having to even go to the parent website. I have a feeling it may be scratching the surface of what's possible. This strikes me as something new and unrecognized as such. Both Slate and Washington Post are avant-garde, stretching way we consume news with contextually aware experiences.