Uncaught SecurityError: Blocked a frame with origin "[my website url]" from accessing a cross-origin frame.

[TobiasWehrum]

I haven't completely investigated this and I would need to build an example website because I can't share my web app here, but maybe this already helps you pinpoint the problem:

Everything was working fine with gyronorm until I added an iframe with a YouTube video over https to my page. Now every time I select a different tab in Chrome and then go back to this tab, I get the above error.

The offending code in the minified version seems to be
for(var b in l.motion.callbacks)l.motion.callbacks[b].call(this)

[TobiasWehrum]

I'm currently trying it with the non-minified version and it happens here:

function handleDeviceOrientationChange ( event ) {

	sensors.orientation.data = event;

	// Fire every callback function each time deviceorientation is updated

	for ( var i in sensors.orientation.callbacks ) {

		sensors.orientation.callbacks[ i ].call( this ); // <-- this line

	}
}

edit: I just realized I wasn't clear; it doesn't exactly happen in this line, but one layer deeper in Array.binaryIndexOf.

edit2: Should for-in even be used here? The first value of i is binaryIndexOf since it iterates over the properties. The loop looks like it should actually iterate over the indizes of the array.

edit3: Using for (var i = 0; i < sensors.orientation.callbacks.length; i++) { apparently made the problem go away and the gyroscope access still seems to work, but since sensors.orientation.callbacks.length is always 0 for me, I have no idea if it is still doing what it should do.