It's a nice website, but when I click on any music genre label, my Firefox asks: "Allow music.ishkur.com to use your HTML5 image data? This may be used to uniquely identify your computer."
It probably uses canvas to draw, but canvas also can be used to fingerprint you
AFAIK that warning is "scripts on this page will capture image data from the window viewport, which in turn can be used to fingerprint you because of how rendering works"