As the years went on, Flash Player became a security nightmare. It was full of "holes" that hackers loved. Eventually, Steve Jobs famously refused to allow it on iPhones, and Google Chrome began blocking it by default.
was a "plug-in"—a piece of software that lived inside your browser to help it draw animations and play sounds.
Here is the story of how that phrase became a legend of the early web. The Era of the "Missing Plug-in"