Home
Takes up the least space, expands when hovered.
Permanently expanded. Can be toggled with a shortcut. ( ctrl+shift+a > TST > right top cogwheel > extension shortcuts)
Supported extension icons are changed, and a mask(generated for custom color with webapp) is applied to unsupported ones to blend them better with rest of the theme.
Switch window-controls to right.
Along with vertical tabs, traditional horizontal tabs are also included.