I really like how the tabs bar looks (1st picture of the 1st page). There's the same space between each tab's name (=/= same tab width) and it looks very neat.
Allowing us to reproduce this would be great.
But dunno how. Maybe, the easiest way would be to allow us to resize manually the tab width and the "lock tab" setting would prevent us from resizing accidentally the tab.
Or maybe an option to handle the tabs bar like the in-line menu bar ?