I'd really like the ability to drag a tab from one window to another, also I'm not a big fan of the sound playing animation on tabs, I think it'd be more pleasing if it was a still image. Other than that, I'd like to praise you on the settings and customization, really enjoying the experience.
+1 on being able to drag tabs to make a new window or dragging to a different window, having to constantly use the menu for that is a major hassle.
For now you can right-click on a tab to move it to a new or another window.
Dragging will come later.