Behind the Curtain A Firefox extension supposed to help you find the backend IP-Address of a website proxied by Cloudflare. Also allows you to gather a lot more information about the website, like querying info from crt.sh, Shodan and IP-API. On top of that, it also allows you to spoof the Host header of the request, which can be useful for pretending to use a different domain, for example when bypassing some Cloudflare protections. Credits: The logo A big special thank you to Skittles (@skitsy. on Discord, @skitty_skits on Twitter) for creating the logo for this extension, both the one with Cloudflare enabled and the one with Cloudflare disabled. MurmurHash3 library I was reading the Shodan blog on favicons and I thought it would be interesting to create a browser extension that would hash the favicon of the current page and then search for it on Shodan. After I started working on this, I checked if someone made a js library for murmurhash3 and I found out that someone already made a browser extension that does exactly what I wanted to do! The extension is called "favicon-hash-browser-extension", please check it out here, I only used the library for hashing from it: https://github.com/michaelknap/favicon-hash-browser-extension/blob/main/src/lib/murmurhash3.js This was after I did most code. I decided to implement it anyway, as I wanted to add a lot more to my extension anyway than just hashing the favicon.