Smaller icons and gaps

[NandiyaLive]

What feature would you like to see?

Can we reduce the icon sizes, collapsed vertical tabs width and gaps? Then there will be more space to view a webpage.
Brave Browser is a good reference for the sizes.

What platform are you seeing the problem on?

Linux

Additional context

No response

[mauro-balades]

Im not planning on doing this but you certainly can by adding a chrome/userChrome.css file inside your profile's directory with the following content:

#navigator-toolbox {
   min-width: 45px;
}