It is fantastic that Firefox gives us the benefit of choice though. Maybe Chrome or whatever has better UX taste out of the box, but good luck changing anything if you disagree.

I wrote a blog post about how I customized Firefox exactly to what I wanted https://varun.ch/posts/firefox/ including a minimal UI, monospaced font, sidebar, etc etc. userChrome.css is a great feature and it’s amazing that it’s just exposed to the user.