Tabs visible at all is wasted space. I only need to see the options when I'm actively trying to change tab. I don't need to see them on the screen at all times.

This is one of the things I love about my Emacs config. I just hit a key to get things like buffers or file trees up when I need them, then they disappear.

I'd love to have a keyboard driven browser but whenever I've tried I always end up with one hand on the mouse anyway so it doesn't work.