At the top of the Firefox window, click the Firefox button, go over to the History menu and select Show All History to open the Library window.On the menu bar, click the History menu and select Show All History to open the Library window.At the top of the Firefox window, click the History menu and select Show All History to open the Library window.

Click the menu button , choose History and then click the Show All History link at the bottom of the list to open the Library window.