Subject: bug#34135: IceCat lacks WebGL support

From: Jonathan Brielmaier <[email-masked]>
Date: Tue, 12 May 2020 20:19:54 +0200

429c8284d232c3f9fbe3dc87a3da323f3a864c03 did preliminary work for ffmpeg
white listing. So we need to add the WebGL required stuff as well to
that whitelist. I'll see what I can do.