auto-close Library window on exit
Other subsidiary windows (such as the Downloads window) automatically close when the main Firefox window is closed, but the Library (History and Bookmarks) window doesn't. Why is this, and is there any way I can change this? Or better yet, is there a setting or extension I can use that will eliminate the separate Library window completely and turn it into just another tab in the main Firefox window?
Alla svar (2)
Use Firefox > Exit or File > Exit to close Firefox with all open windows.
That is usually the best way to close Firefox.
{Ctrl + H} and {Ctrl + B} open the History and Bookmarks sidebars, respectively. Why use the Library window?