here is the video: https://goblinrefuge.com/mediagoblin/u/tomlukeywood/m/how-to-compile-gnu-icecat-from-source/
Make sure to view the original file though as goblin refuge compresses it too much :(
https://b2aeaa58a57a200320db-8b65b95250e902c437b256b5abf3eac7.ssl.cf5.rackcdn.com/media_entries/6276/rendered.webm