Bidding Farewell to Legacy Add-Onsįinally, Firefox 56 is the last release to support legacy APIs for add-ons. You can find the source code for the debugger on GitHub. You can read all about the current and upcoming features in Julian Descottes’s article, but we’re especially proud of our completely new debugger: as part of the “ devtools.html” project, we completely rewrote the debugger as a modern web application, powered by React / Redux, and using standard HTML, JavaScript, and CSS. We’ve also put an enormous amount of effort into Firefox’s Developer Tools. This is remarkably useful for automated testing, both during local development and as part of a continuous integration (CI) pipeline. What’s New for Developersįor developers, Firefox now supports “headless” mode on all operating systems, which makes it possible to run Firefox without actually displaying a window on the screen. Second, Firefox is now 64-bit by default on all operating systems, and existing 32-bit installations will automatically upgrade to 64-bit builds if supported by the underlying hardware.

For example, you can right-click on any node in the Inspector to capture a screenshot of that node, or you can use the screenshot command in the Developer Toolbar. Of course, the Developer Tools retain their own screenshot capabilities. The tool makes it easy to select regions of the page based on the underlying DOM structure, though both full-page and free-form screenshots are also available.

What about last week’s release of Firefox 56? Browser Featuresįor users, Firefox 56 sports two major changes:įirst, Firefox Screenshots is a brand new, built-in tool for capturing and (optionally) sharing images of web pages. Here at Mozilla, we’re extremely excited about next month’s release of Firefox Quantum ( preview it today in Developer Edition!) which brings massive speed improvements, a brand new UI, and several new or improved Developer Tools.īut that’s next month.

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