Gnome is relatively easy to customize with CSS (at least in recent versions, I think after 3.20). I wrote some quick notes about it here: https://www.bidon.ca/

Gnome is relatively easy to customize with CSS (at least in recent versions, I think after 3.20). I wrote some quick notes about it here: https://www.bidon.ca/fr/random/2017-02-25-customizing-gnome-shell-3-20 https://www.bidon.ca/fr/random/2017-02-25-customizing-gnome-... It also has an inspector, so you can find the right class name as you would when doing CSS in a browser. I have to admit that I also tried developing an extension (https://github.com/mlutfy/hidetopbar https://github.com/mlutfy/hidetopbar), which I found hard, but someone else took over maintenance and he's been doing a really good job. Has a few active contributors too. (after 10 years on fvwm, I re-tested every w-m out there, before giving up and adopting Gnome3.. happy since)