Some automated systems need more flexibility than just creating a HAR file after every page load. If you want to create a HAR file automatically for every loaded page you need to set the following preference (use about:config) to true:ĭ when testing web applications using Selenium).
Support for exporting HAR (the HTTP Archive format) from the Network panel is now a built-in feature and you don’t need an extension for it. There is a Pixel Perfect start button allowing quick access to this feature.Īnd here is the final Pixel Perfect UI that you can open by clicking on the button above. These layers can then be used for per pixel comparison between the page and a layer. Pixel Perfect is a Firefox extension that allows web developers and designers to easily overlay a web composition with semi-transparent layers (images). Clicking the icon opens a popup with details. The Inspector panel also displays the envelope icon for elements with jQuery data. There is also a jQuerify button in the Console panel toolbar and you can use it to load jQuery into the current page. You can inspect it by clicking on the icon. Firebug 3 isn’t required, but some of the screenshots below show DevTools with the Firebug theme activated (the other themes, Light and Dark, are also supported).Įlements with jQuery data associated display a little envelope icon in the Console panel. FireQuery extensionįireQuery is a Firefox plugin for jQuery development built on top of DevTools in Firefox.
If you are an extension developer you might be interested in some examples and links to other resources helping to understand how to extend DevTools. Firebug isn’t required to run these extensions. Not only does this keep popular features alive, these implementations also provide great examples of how you can make new extensions directly for DevTools. Some of the most popular extensions have been re-implemented on top of DevTools. XHR previews in the Console panel (requested many times) are also supported.
It isn’t supported natively (yet) and so, Firebug offers it to you. You might be a fan of the DOM panel used to inspect the document object model of the page you’re on. The process for entering your handy tools is exactly the same: you can either press the start button or the F12 key.
See, the Firebug Theme option is currently active. There is also the well-known Firebug start button in the Firefox toolbar, which represents the entry point to the developer toolbox. It’s the Firebug theme ported into DevTools to bring some UI and layout advantages. Does this look familiar?įirebug 3 (aka Firebug.next) isn’t distributed through AMO yet, so you might need to set the preference (through about:config) to false.
Take a look at the screenshot below showing what DevTools look like if you install Firebug 3 (first beta). some of those you’ve been using in previous versions of Firebug), you should expect them to be part of DevTools in the future. There are also a few additional features, that we’ll port into DevTools step by step. Firebug 3 is not another developer tool, it is rather a thin layer built on top of DevTools, providing a new theme that makes DevTools look like Firebug. This is where Firebug 3 (aka Firebug.next) comes in. The main goal of next-generation Firebug is to help users feel at home when working with native DevTools. Yes, as we’ve mentioned before, we’re focused on developing one great tool for developers! We’ve been also working hard to make the transition path from Firebug to DevTools as simple and smooth as possible. We’ve been working hard to port all favorite Firebug features into native DevTools, make them multi-process compatible, and available for remote debugging (i.e., e10s compatible). You might have already heard about our effort to unify native Firefox Developer tools (DevTools) and Firebug.