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by achal 5047 days ago
You have to open the inspector first (Ctrl+Shift+I or Firefox->Web Developer->Inspector), and then click the "3D" button on the bottom left (or bottom right if you're on some beta/nightlies).
1 comments

Unfortunately it requires webgl which I don't have on any pc. I couldn't find any easy way to install it.
Check `about:support` and see if webgl was disabled because of the driver version. That might be it.