Apparently, plugins are on their way out. Fortunately though, there’s still a way to tweak Firefox to keep your favorite plugins running.
Firefox 52 will be the first release version of the Mozilla Firefox web browser that will ship without support for NPAPI plugins. The only exception to the rule is that Firefox 52 will support Adobe Flash. All other plugins, Silverlight, Java, and all the others, won’t be supported anymore in the Firefox version. While plugin use is on the decline, scenarios exist where plugins are still required to use sites or services on the Internet.