If you want to select and move multiple tabs at the same time – for example to move the tabs to a new window – here’s what you need to do:
Select any open tab
Hold the ctrl key on your keyboard
Click to select as many tabs as you want
Let go of the ctrl key (important)
Drag the selected tabs to move them to a new location or to a new window (when you drag and drop them out of the tabs area, a new window is automatically created)
Enjoy!