![]() :) In brief, the Developer Edition is a new release channel for Firefox, replacing Aurora (our pre-Beta channel). Our community website explains how to get involved.įirefox DevTools source code documentation.Hi! Just a heads up that folks from the dev tools team will be monitoring this thread and are on-hand to answer questions. If you want to help improve the developer tools, these resources will get you started. To ease a transition from Firebug to the Firefox developer tools, we have written a handy guide - Migrating from Firebug Contribute ¶ Migrating from Firebug ¶įirebug has come to the end of its lifespan (see Firebug lives on in Firefox DevTools for details of why), and we appreciate that some people will find migrating to another less familiar set of DevTools to be challenging. See messages logged by the browser itself and by add-ons, and run JavaScript code in the browser’s scope.Īttach the Developer Tools to the browser itself.įor information on extending the Firefox DevTools, see Extending the developer tools over in the Browser Extensions section of MDN. This is useful for browser and add-on development. But you can also connect them to the browser as a whole. But you can attach the tools to a variety of other targets, too, both within the current browser and in different browsers or even different devices.ĭebug add-ons, content tabs, and workers running in the browser.Ĭonnect the developer tools to an instance of Firefox running on an Android device.Ĭonnect the developer tools to a specific iframe in the current page.īy default, the developer tools are attached to a web page or web app. ![]() If you open the developer tools using keyboard shortcuts or the equivalent menu items, they’ll target the document hosted by the currently active tab. Overlay horizontal and vertical rulers on a web pageĬustomize the way objects are displayed within the DevTools.įor the latest developer tools and features, try Firefox Developer Edition.ĭownload Firefox Developer Edition Connecting the Developer Tools ¶ Take a screenshot of the entire page or of a single element. View and edit CSS styles for the current page. Inspect the page’s DOM properties, functions, etc. Inspect cookies, local storage, indexedDB, and session storage present in a page. Unlike the “Core Tools” above, you might not use them every day.įigure out which objects are keeping memory in use. These developer tools are also built into Firefox. The collective term for the UI inside which the DevTools all live is the Toolbox More Tools ¶ This includes inspection of service workers and web app manifests Provides tools for inspecting and debugging modern web apps (also known as Progressive Web Apps). Provides a means to access the page’s accessibility tree, allowing you to check what’s missing or otherwise needs attention. ![]() See how your website or app will look and behave on different devices and network types. Performance Panel ¶Īnalyze your site’s general responsiveness, JavaScript, and layout performance. ![]() See the network requests made when a page is loaded. Stop, step through, and examine the JavaScript running on a page. See messages logged by a web page and interact with the page using JavaScript. Visualize many aspects of the page including the box model, animations, and grid layouts Web Console ¶ The menu also includes links to the documentation for Firefox Or hide the split console, and Developer Tools settings. Opens the menu that includes docking options, the ability to show Page and select the one with which you want to work.Ĭlick this button to take a screenshot of the current page.ĭefault and must be enabled in settings before the icon will Click it to display a list of the iframes on the current This button only appears when there are multiple iframes on a The ellipsis menu on the right-hand side of Developer Tools contains several commands that let you perform actions or change tool settings. You can open the Firefox Developer Tools from the menu by selecting Tools > Web Developer > Web Developer Tools or use the keyboard shortcut Ctrl + Shift + I or F12 on Windows and Linux, or Cmd + Opt + I on macOS. If you are just getting started with web development and using developer tools, our learning docs will help you - see Getting started with the Web and What are browser developer tools? for good starting points.
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