Investigate fingerprintability and OPSEC of "widget.gtk.hide-pointer-while-typing.enabled"

This preference controls if the mouse cursor should be hidden when typing. Seems to be only relevant for Linux.

Default is true. On Windows it's hidden by default by OS settings for all programs. I feel like it may be worth to turn this behavior OFF for all Tor Browser users of all OSes and see if it has any effect on fingerprinting or OPSEC.

Thanks.

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