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  • Async/Await Arrive in Firefox

    The new async and await keywords—which make asynchronous code more concise, obvious, and maintainable—have arrived in Firefox 52. Currently available in the latest Developer Edition release, Firefox 52 is scheduled for general release in March 2017. JavaScript owes its excellent single-threaded performance and responsiveness on the web to its pervasively ...

  • CSS Grid and Grid Highlighter Now in Firefox Developer Edition

    CSS Grid has just been uplifted to Firefox 52 Developer Edition (download it here!). With Chrome (and hopefully Safari and Edge) implementations coming shortly, using grid to build websites will soon be possible in release browsers across the board. Grid allows users to decouple HTML from layout concerns, expressing those ...

  • Visualize animations easing in DevTools

    The easing (or timing function) of an animation is what dictates the way it progresses through time. For example, a linear easing means that an animation runs at the same speed throughout its duration. This means that if an element isn’t moving at first and then starts to move, it ...

  • New Responsive Design Mode: RDM Lands in Firefox Dev Tools

    Firefox Developer Tools now includes a completely redesigned Responsive Design Mode (RDM for short) that’s just landed in Firefox Developer Edition, thanks to hard work from the DevTools team. In a mobile-first world, it’s essential to prioritize performance for low-bandwidth and offline mobile experiences and design progressive web apps that ...

  • Rust and the Future of Systems Programming

    If you’re a regular reader of Hacks, you probably know about Rust, the ground-breaking, community-driven systems programming language sponsored by Mozilla. I covered Rust on Hacks back in July, to note a major milestone for Mozilla, when we shipped Rust in Firefox for the first time. Meanwhile in Rust-land, the ...

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