Is it possible to disable the cursor from being recorded with getDisplayMedia()

I am recording my browser window using MediaStream and MediaRecorder.

But need to disable the mouse cursor from being recorded, so when I create my video track, i use the following code:

stream['input'] = await navigator.mediaDevices.getDisplayMedia({
    audio: true,
    video: {
    cursor: 'never',
    frameRate: 40,
}
});
console.log( stream['input'].getVideoTracks()[0].getSettings() );

However chrome, opera and edge console displays:

aspectRatio: 1.7777777777777777
cursor: "motion"
deviceId: "window:200730:1"
displaySurface: "window"
frameRate: 40
height: 1080
logicalSurface: true
resizeMode: "crop-and-scale"
width: 1920

But seem to ignore the setting, so the cursor is being recorded.

I can see the frameRate constraint is being set in my console, however I just cannot for the life of me seem to disable the cursor.

Yet, firefox doesn't record the cursor and shows this in the console

frameRate: 40
​height: 924
​width: 1263

Has anyone successfully managed to disable the cursor at all with Chrome, Edge and Opera?

i've even tried using

stream['input'].getVideoTracks()[0].applyConstraints( { 
video: { cursor: 'never', frameRate: 30 } 
} );

Which doesn't work :-(

Update: I can see from the chart here: https://developer.mozilla.org/en-US/docs/Web/API/MediaTrackConstraints

that the cursor constraint is only supposed to be supported on opera. However the output from getSupportedConstraints() shows cursor is not supported after all.

Thanks

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