WebGL is built-in and controlled by these two prefs in about:config. *webgl.disabled *webgl.enable-webgl2 There is also: webgl.force-enabled You can search "Help -> More Troubleshooting Information" (about:support) for webgl to see if there are issues reported. *https://support.mozilla.org/en-US/kb/use-troubleshooting-information-page-fix-firefox See also the test website. *https://webglreport.com/?v=1 *https://webglreport.com/?v=2