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  • Quickly Alter Typography with Firefox Font Editor

    Have you ever landed on a web page and wondered what fonts are being used? Have you asked yourself where those fonts come from or why a particular font isn't loading? The font editor in Firefox provides answers and insights, and gives you the ability to make font changes directly, ...

  • Faster Layouts with CSS Grid (and Subgrid!)

    CSS Grid has been available in most major browsers since early 2017, and it makes web layout more powerful than ever before. But complex-looking new syntax (line-names! grid-areas! minmax! fit-content! fr units!) and missing IE11 support can make it scary. Don’t let that stop you. Miriam Suzanne offers some basic ...

  • Developing cross-browser extensions with web-ext 3.2.0

    The web-ext tool was created at Mozilla to help you build browser extensions faster and more easily. Although our first launch focused on support for the desktop Firefox browser, followed by Firefox for Android, our vision was always to support cross-platform development once we shipped Firefox support. With the 3.2.0 ...

  • Firefox’s New WebSocket Inspector

    The Firefox DevTools team and our contributors were hard at work over the summer, getting Firefox 70 jam-packed with improvements. We are especially excited about our new WebSocket inspection feature. To use the inspector now, download Firefox Developer Edition, and open the DevTools’ Network panel to find the Messages tab. ...

  • The Mozilla Developer Roadshow Talks: Firefox, WebAssembly, CSS, WebXR and More

    The Mozilla Developer Roadshow program launched in 2017 with the goal of bringing expert speakers and web technology updates to local communities through free events and partnerships. Check out the video playlist from our summer tour, with talks on topics like Mixed Reality, WebAssembly, modern CSS, and more. Or register ...

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