No one has the same fonts I do, apparently. You could also probably infer my occupation from my preponderance of monospaced fonts. I'm surprised to find that s

No one has the same fonts I do, apparently. You could also probably infer my occupation from my preponderance of monospaced fonts. I'm surprised to find that simply by having Ubuntu that I tweaked to my liking and a laptop, you can uniquely identify me by how much screen space I have left. Can anyone give me an explanation of how the media devices thing works, though? Is video in and audio in given some random hash which websites can then use as the random hash which identifies me?