Do other WebGL applications work? Anything suspicious in the Graphics section of about:support? It's probably a preference, and you might start with something

Do other WebGL applications work? Anything suspicious in the Graphics section of about:support? It's probably a preference, and you might start with something obvious like webgl.disable=true. However, you might rather just try Refresh Firefox, which resets your profile while keeping your bookmarks/history/open tabs. https://support.mozilla.org/en-US/kb/refresh-firefox-reset-add-ons-and-settings https://support.mozilla.org/en-US/kb/refresh-firefox-reset-a...