Very rarely do I see a plugin crash in my browser, so I thought it was very funny when the first plugin to crash in my browser (probably ever) was the DRM plugin. To be fair it was doing its job when it happened, but you'd think Google's WideVine Content Decryption Module would be programmed well. It probably doesn't like the firefox sandbox I suppose but who knows.
I would've expected it to have very good error handling since it's so widely used but seemingly not, either that or an implementation problem in FireFox. Who knows?
Surely nothing can go wrong with the completely open™ best part of the W3C web specifications /s