The Java plugin hasn't been supported by browser for quite some time. Why-do-Java-Silverlight-Adobe-Acrobat-and-other-plugins-no longer work. *https://support.mozilla.org/en-US/kb/npapi-plugins Support for Flash should still work in Firefox 84, but will also end in January next year. Flash EOL: *https://blog.mozilla.org/futurereleases/2020/11/17/ending-firefox-support-for-flash/ *https://helpx.adobe.com/flash-player/release-note/fp_32_air_32_release_notes.html *https://www.adobe.com/products/flashplayer/end-of-life.html