>“Why are windows called frames, and tabs called windows?” Windows are called frames in Emacs, yes, but it is panes, not tabs, that are called windows. Tabs ar

>“Why are windows called frames, and tabs called windows?” Windows are called frames in Emacs, yes, but it is panes, not tabs, that are called windows. Tabs are called buffers. (More precisely, the closest analog to a browser tab is an Emacs buffer, and a tab in VSCode is an almost-perfect analog to a buffer in Emacs.)