Chrome moves tabs between windows when we drag a tab from one window to the other (even if the tab from the other window is the last one). Without this working with multiple monitors is a bit of a pain since we have to copy the URL to create a new tab in the window that we want.
You can reattach a tab from one window to another. Tab tear-off and reattach option is available since 0.15.0
I just realized that it is true, but you need to drag the tab from the other window on top of another tab or before the “+” button, if you drop it in the tab bar to the right of the “+” it doesn’t work.