There are several tab and tree manipulation features that are not in the menu (and therefore not accessible throught keyboard shortcuts) and can currently only be performed with the mouse (often by drag-and-dropping) or even not at all. These include:
- moving a tab or tree up and down the sidebar (or left and right in the tab bar)
- moving a tab or tree into or out of a tree (in-/out-denting)
- expanding or collapsing a tree
- moving a whole tree to a group (currently not possible at all in one step)
This would allow users to completely organize and navigate their open tabs and trees without needing to use the mouse. Extensions like Sidebery have supported this kind of shortcuts of a very long time.
NB: I've tried to implement this through an Orion extension but there doesn't seem to be a consistent way to set a tab's parent or even its position through the available API.
