Recommended web development tool Firefox extension CSS Viewer

When making or modifying themes, you often check and debug CSS styles and layouts in the browser. If you are not familiar with DIV+CSS, you can easily view the theme's layout and styles by using Firefox's extension functions Firebug Besides, there is CSSViewer , which is also a FIREFOX plug-in that can preview the DIV layout of a web page. It can detect the CSS properties of the DIV on the web page, as shown in the figure: