Recent Articles

  • MDN’s First Annual Web Developer & Designer Survey

    Today we are launching our first annual MDN Developer & Designer Needs Survey. Web developers and designers, we urge you to participate! This is your opportunity to tell us about your needs and frustrations with the web. Your participation will influence how browser vendors like Mozilla, Google, Microsoft, and Samsung prioritize feature development.

  • Eric Rescorla

    Add-Ons Outage Post-Mortem Result

    We've been conducting an ongoing post-mortem on the add-ons outage that occurred earlier this year. There was a lot more digging to do than we expected. In addition to this updated high-level overview, we've also published our findings in detailed incident and technical reports that are now available.

  • Mike Conley

    Testing Picture-in-Picture for videos in Firefox 69 Beta and Developer Edition

    Firefox has an experimental new UI feature in Firefox 69 Beta and Developer Edition - and Firefox engineers are looking for feedback on the implementation. Picture in Picture in the browser lets you pop a video out from where it’s being played into a special kind of window that’s always on top. Then you can move that window around or resize it however you need! Let us know what you think.

  • Firefox 68: BigInts, Contrast Checks, and the QuantumBar

    Firefox 68 is available today, sporting support for big integers, whole-page contrast checks checks for accessibility, and a completely new implementation of a core Firefox feature: the ever-awesome URL bar. Dan Callahan also reports on updated CSS scroll-snapping and other features, DOM API updates, next steps in the WebRender implementation, and more.

  • GeckoView in 2019

    Introducing the initial release of Firefox Preview (GitHub), an entire browser built from the ground up with GeckoView and Mozilla Android Components. Firefox Preview is our platform for building, testing, and delivering unique features. Though still an early preview, this is our first end-user product built completely with these new technologies. Plus, we share an update on where GeckoView is going in the second half of 2019.

  • How accessibility trees inform assistive tech

    The web was designed with built-in features to make accessibility possible; these have been part of the platform pretty much from the beginning. In recent times, inspectable accessibility trees have made it easier to see how things work in practice. In this post we look at how “good” client-side code (HTML, CSS and JavaScript) improves the experience for users of assistive technologies, and how developers can use accessibility trees to help verify that these users aren't left out.

  • View Source 5 comes to Amsterdam

    Mozilla’s View Source Conference is back! This year we're in Amsterdam, September 30 – October 1, 2019. Tickets are available now. We’ve shifted our focus to take a deeper look at the web platform and how it is evolving and to offer attendees access to the folks who are shaping today's web and the web of the future.

  • CSS Scroll Snap Updated in Firefox 68

    The CSS Scroll Snap specification gives us a way in CSS to snap between different elements in a page or scrolling component. In this post, Rachel Andrew explains how scroll snapping works, why we had a situation where browsers were running different versions of the specification, and how that's changing.

  • CSS Grid Level 2 – subgrid is coming to Firefox

    The subgrid feature which is part of Level 2 of the CSS Grid Specification is not yet shipping in any browser, but is now available for testing in Firefox Nightly. This is a feature that, if you have used CSS Grid for a layout of any complexity, you are likely to be pretty excited about

  • Indicating focus to improve accessibility

    Focus indicators make the difference between day and night for people who rely on them. Focus is something that happens between the interactive elements on a page. In this post I will explain what we mean by focus, show you how focus outlines make your site easier to use for anyone who relies on the keyboard, and share examples of why it's a best practice to never remove them.

  • JavaScript and evidence-based language design

    In what ways can empirical evidence be used in the design of a language like JavaScript? At TC39, as stewards of the JavaScript specification, how do we answer questions about the design of JavaScript and help make it accessible to the thousands of new coders who join the industry each year? To answer this we need to experiment, and I need your help.

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