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(function(){
if(navigator.userAgent.toLowerCase().indexOf('firefox') > -1){
// Firefox does not correctly reject the Clear Key session types it does not support
var _requestMediaKeySystemAccess = navigator.requestMediaKeySystemAccess.bind( navigator );
navigator.requestMediaKeySystemAccess = function( keysystem, configurations )
{
if ( keysystem !== 'org.w3.clearkey' ) return _requestMediaKeySystemAccess( keysystem, configurations );
var supported_configurations = configurations.filter( function( c ) {
return !c.sessionTypes || ( c.sessionTypes.length === 1 && c.sessionTypes[ 0 ] === 'temporary' );
} );
if ( supported_configurations.length === 0 ) return Promise.reject( new DOMException( 'None of the requested configurations were supported.' ) );
return _requestMediaKeySystemAccess( keysystem, supported_configurations );
}
}
}());