When using Vertial Tabs you have an option to totally hide the sidebar, which hides the tab window, or show the sidebar, which takes up a lot of space. I would like a third option of just showing the tab icons, and when you hover over them the full sidebar would pop out..
This is a feature avliable in edge, allowing tabs to take up a fraction of the screen relastate that the full sidebar takes.
In the image you can see Orion sidebar vs the Edge tabs: 