YouTip

* * * > The official Firebug website has announced the discontinuation of further development, updates, and maintenance for Firebug, inviting everyone to use the built-in Firefox tool (https://developer.mozilla.org/en-US/docs/Tools). ## What is Firebug? **Firebug** is an open-source web development tool. In this chapter of the tutorial, we will discuss the following topics: * How to install Firebug. * * * ## Installing Firebug Firebug download link: https://addons.mozilla.org/en-US/firefox/addon/1843/ Use the Firefox browser to visit the download link above. After opening the page, click the download button. A pop-up window will appear, prompting you to select an installation directory. After installation, restart your Firefox browser. After restarting, you will see the Firebug icon in the Firefox browser. Click the Firebug icon (located in the upper-right corner of the Firefox browser) to activate the Firebug add-on.  * * * ## Firebug Components ### Firebug Options  ### Inspect Element on the Page  ### Undo and Redo  ### Show Command Line  ### Panel Selector  ### Console  ### HTML Panel  ### CSS Panel  ### Script Panel  ### DOM Panel  ### Network Panel (for webpage speed testing and optimization)  ### Other Buttons  * 1 - Minimize Firebug. * 2 - Dock Firebug to the browser window. * 3 - Disable Firebug.