Use Shift+Alt+W (configurable shortcut) or click the toolbar icon to cycle through some preset width modes (720px, 900px, 1080px, "Fit Content"). This add-on affects the style of the <body> tag, namely the width and max-width properties, and adds a subtle status bar at the top.
Keywords: resize shrink view small large full widescreen browsing center wide narrow fit-content configure column decrease
