Tweak Square Window Buttons for major browsers

[scottyphillips]

Good Morning Vince,

The fluent theme is my absolute favorite. Its so good my wife cannot even tell the difference between Gnome 46 and Windows 11.

I was just inquiring whether it was possible to sort out the square window buttons for three major browsers so it looks a bit more consistent with the GTK4 apps. I know the apps are a bit funny with custom decorations, tabs etc, but thought I would ask the question regardless.

For example, there is a little bit of margin around the close icon on Firefox:

Microsoft Edge is slightly better, but still has some margin around the close icon:

Chrome is basically in the same boat as Edge, probably the best of the three, but still a bit of white space.

Not sure if this is a trivial CSS fix or not?

Thanks once again for a great theme.