

In Firefox, enter about:config in the location bar, and confirm the warning dialog.

Firefox 52 allows you to override the plugin block using a preference setting in about:config. Fortunately, Fedora users still have options to bypass that plugin ban. The exception is Flash, but Firefox will remove its support in the future, too. The stock Firefox 52 browser disables these components. Some well known NPAPI plugins are Flash, Java, and the GNOME Shell web extension. NPAPI plugins are binary components integrated to the browser. Mozilla decided to stop supporting NPAPI plugins for Firefox browser two years ago.
