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Firefox Quantum: Developer Edition

Get the latest features, fast performance, and the development tools you need to build for the open web.

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Developer resources

MDN

The best resource for the Open Web.

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Firefox DevTools

Edit and debug HTML, CSS, and JavaScript.

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WebAssembly

Use the .wasm format as a compiler target.

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Cross-browser testing

Easily test your site on every browser and operating system.

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Events to check out

Fresh from our blog

Fresh from our blog

  • Firefox 64 Released

    The year’s last release of Firefox bundles together goodies for all, including multi-tab management in the interface, new CSS features, devtools improvements, better privacy protections, add-ons updates, and much, much more. Read all about it!

    Read more

  • Rust 2018 is here… but what is it?

    Starting today, the Rust 2018 edition is in its first release. With this edition, we’ve focused on making Rust developers as productive as they can be. Most of the language changes are completely compatible with existing Rust code. Because they don’t break any code, they also work in any Rust code… even if that code doesn’t use Rust 2018. This is because of the way the language is evolving. Lin Clark illustrates and explains.

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  • LPCNet: DSP-Boosted Neural Speech Synthesis

    LPCNet is a new project out of Mozilla’s Emerging Technologies group — an efficient neural speech synthesiser with reduced complexity over some of its predecessors. Neural speech synthesis models have already demonstrated impressive speech synthesis quality, but their computational complexity has made them hard to use in real-time, especially on phones. Our solution with LPCNet uses a combination of deep learning and digital signal processing (DSP) techniques.

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Projects we love

A new layout system for the Web.

See grids in action

Mozilla’s next-generation web engine.

Get involved

A systems programming language that is fast and safe.

Check out Rust

Powerful Web technologies that help push games to the new level.

Learn more

Build exciting virtual reality Web pages using HTML.

Start building