Resizing popups

From MozillaZine Knowledge Base

Sometimes pop-up windows are too small to display all their content, and they are not always resizable by default. To make them always resizable, type about:config in the Location Bar and press Enter. Find dom.disable_window_open_feature.resizable (There's a filter right below the Location Bar), double click the value and it will change to true. Now you can resize all windows.