Ugh, new Safari tabs UI.
To drag the whole window, drag a tab?
To drag a tab, you need to press and hold (!!!). A gesture that is unprecendented in macOS.
To drag current tab, you need to drag a textfield. Ugh.
Back/forward buttons are outside of current tab, so not clear what they control.
Back/forward buttons appear/disappear depending on a selected tab, so most of the OTHER tabs expand/shrink on every tab switch, even if it happens far away from them.
Active tab shows URL, others show page title. It all changes constantly.
What a mess.