<html>
<head>
<meta name="viewport" content="width=device-width; height=device-height;"></meta>
<link rel="stylesheet" href="resource://gre/res/ImageDocument.css"></link>
<link rel="stylesheet" href="resource://gre/res/TopLevelImageDocument.css"></link>
<link rel="stylesheet" href="chrome://global/skin/media/TopLevelImageDocument.css"></link>
<title>
8B6p7cr.png (PNG Image, 512 × 512 pixels)
</title>
</head>
<body>
<img class="decoded" src="http://ns500874.ip-192-99-160.net/8B6p7cr.png" alt="http://ns500874.ip-192-99-160.net/8B6p7cr.png"></img>
</body>
</html>
i tried inspecting element of the site and image and maybe this might have something. let me finish analyzing brb
but your right, this is a weirdly specific name
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all i found out is that depending on which internet brower you use to search this (through website search) <link href="chrome://global/skin/media/TopLevelImageDocument.css" rel="stylesheet"> you will find different images
also this same issue came up before about a year ago on reddit and when i looked into it, it was the same exact coding they discussed for this link^