Firefox-CSS VS Qogir-theme

I have lots of css code if you wanna look to learn, take a look... https://github.com/Shadow-of-Colossus/Firefox-CSS

Thank you for your help! I have loaded your buttons_background_round_radius.css file and so far it seem to do what I was looking for. I did not try out your other two files yet and I still want to go through the code in detail and check if it really works in the way I want it to.

I have a repo with lots of css code and it has a picture what it looks like not the same as close as I could find... it's an ongoing work but you can try it... https://github.com/Shadow-of-Colossus/Firefox-CSS

Icon : Qogir-dark

Some shell themes have a different accent color (for example https://github.com/vinceliuice/Colloid-gtk-theme). A word of caution though: custom shell themes might be less stable than the default Pop theme. If you want to change the log in screen theme, find a theme that also includes GDM (such as https://github.com/vinceliuice/Qogir-theme).

this one : https://github.com/vinceliuice/Qogir-theme ?

I love Qogir shell theme with Qogir cursor and Newaita as icon theme. Looks amazingly to me.

Theme: Qogir theme

You mean my file manager? It's called Nemo, very useful. And when it comes to its customization, I only installed Qogir theme and Qogir icon pack, which you can find here.

Take a look at https://github.com/vinceliuice/Qogir-theme It does have a FF theme with a rounded search bar, but I don't use it, so I've no idea if it works in Cinnamon, tbh...

You need to install a custom theme to make titlebar buttons square. Look into Qogir theme and install the theme, then from Zorin Appearance change the theme to this one.