_thph
Firefox to my eye jumped the shark a long, long time ago, when they took to using deliberate deception during the install process to get people to sign up to a Mozilla account.
Pretty much everything they've introduced for years I've not wanted or disliked.
The saving grace has been that pretty much everything can be turned off in about::config.
I may be wrong, but I think Moz has become a typical larger company, wholly divorced from its users, unable to know what users want, let alone respond.
What Moz as a large company wants is really completely different to what users want, and a unique tracking ID is a shining example of this.
I'll be using Tor, but I my secondary browser now has to change, as this is intolerable.
Note I'm pretty sure about half of them are admin-type guides, not developer guides; they'll be superficial, and do things like walking you through the screens to start a cluster.
One note : in my view, the official docs are harmful, because they are so poorly written, and so are misleading. I am absolutely certain, from what I have seen documented and then what I have found Redshift is actually doing, that no one technical reviews the official docs. By all means read them, but have your paranoia turned up to 11.
I maintain a web-site where I research Redshift internals and publish white papers. High on the to-do list is a "Introduction to the Fundamentals" paper, which will be exactly what you need. In the meantime, the existing white papers may be of use to you.