[amelius]

The fix is to make the Tor browser preload all images.

Unfortunately, as always, using Tor will make things slower.

[mcv]

Preloading images so they're ready to show when needed, does not sound like unreasonable behaviour, especially on a connection with high bandwidth but low latency.

It will make this kind of example really slow, but if the intention is to break this kind of spying, then that's okay.

[quickthrower2]

Or no network communication unless during initial page load. (I assume you'd have JS disabled anyway if you want this level of privacy)

[ehsankia]

If you're disabling JS, you should probably be able to disable onhover too.

[baroffoos]

And break navigation on half of the nav bars on the web?

[ehsankia]

disabling JS already break half the sites :)

[zbentley]

More than half.