The simple fact of the matter is, Google were the first company to ship production hardware or software that used HTML5 EME, and what's more it was incredibly locked down. Their HTML5 EME implementation only plays back on approved Chromebook hardware from official suppliers that's locked down from the hardware up to prevent users from running any unauthorized applications on the system. Turning off the restriction on unauthorized code also disables the decryption module. It's thanks to Google that soon there'll be 100% standards compliant HTML5 sites that can only be legally viewed on locked-down, single purpose web browsing machines from approved manufacturers.