> Multi-select tab management (Ctrl+Click, Shift+Click to select, drag, snap and move multiple tabs)
You could try the Multiple Tab Handler[1] extension. It seems a bit clunky and limited if you use it alone, but it integrates well with Tree Style Tabs [2]. Note that you could open the vertical tabs sidebar when you need to manage tabs and close it right after. You can also disable the "tree" feature of tree style tabs.