Firefox 4 Beta 8 released with WebGL activated by default, WebGL brings 3D graphics to Firefox 4 opening the door for developers to create vivid games and new kinds of visualizations and experiences for the web. Mozilla claims Firefox 4 supports WebGL for a large number of built-in graphics cards on Mac and Windows.
Update: Mozilla has enabled WebGL 2.0 support in Firefox from version 51.
If you wish, you can disable WebGL in Firefox, here is how.
Disabling WebGL in Firefox
1. Type about:config in Firefox address bar and continue with the warning dialog.
2. Type ‘Webgl’ in the Filter box and change
webgl.disabled preference value to true.
3. Restart Firefox browser, WebGL has been disabled in Firefox browser.
Also read: how to disable WebGL in Chrome .