The other day while trying to view the latest trailers on the Internet Movie Database (IMDB), I encountered the following error: I’d played videos on IMDB in just the recent past, and I was using the same system and browser. It’s always frustrating to not get what you want when you have a few minutes of spare time to goof-off, so at first I just tried again. Same error. I tried a different video. Same error. Videos on other websites such as YouTube or Vimeo hadn’t show any such errors before, and I use them regularly. I know that Firefox 52 ESR is capable of playing videos via HTML5. I even have Adobe Flash installed. But IMDB wasn’t trying to use it. Firefox lets you install a mind-bogging[…]