I maintain a small collection of single-purpose web tools. Last month I built a favicon checker: you type a URL, it reads the icon declarations in the HTML head, probes every referenced file, and also hits /favicon.ico directly, because plenty of software still requests that path without ever reading your HTML. The first thing you should do with any auditing tool is point it at your own stuff. So I did. Ten sites, all built by me, all shipped and verified in browsers I actually use. All ...