There can be multiple reasons but this would mean that either your browser at this particular version does not support vibration or your device is not supported for this current version.
Try updating or changing your browser and try and check to see if there is an update for your device.
If you don't get it to work even after all of these steps then it must probably be that your device is not supported.
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I can't get this to vibrate on my android. I don't get it. Is there a setting I need on?
There can be multiple reasons but this would mean that either your browser at this particular version does not support vibration or your device is not supported for this current version.
Try updating or changing your browser and try and check to see if there is an update for your device.
If you don't get it to work even after all of these steps then it must probably be that your device is not supported.