Articles by Dan Callahan
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Debugging WebAssembly Outside of the Browser
WebAssembly has begun to establish itself outside of the browser via dedicated runtimes like Mozilla’s Wasmtime and Fastly’s Lucet. While the promise of a new, universal format for programs is appealing, it also comes with new challenges. At Mozilla, we’ve been prototyping ways to enable source-level debugging of .wasm files using existing tools, like GDB and LLDB.
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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.
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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.
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Firefox 67: Dark Mode CSS, WebRender, and more
Firefox 67 is now available in general release, bringing a faster and better JavaScript debugger, support for CSS
prefers-color-schemequeries, and the initial debut of WebRender in stable Firefox. Dan Callahan walks through the highlights of browser, platform, and tooling features. -
Firefox 66: The Sound of Silence
Firefox 66 is out, and brings with it a host of great new features like screen sharing, scroll anchoring, autoplay blocking for audible media, and initial support for the Touch Bar on macOS.
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Firefox 65: WebP support, Flexbox Inspector, new tooling & platform updates
Firefox 65 ships today with some notable Firefox Devtools updates, including the release of the CSS Flexbox Inspector, a new changes panel, and more. We're shipping CSS platform improvements and updates to a variety of JavaScript APIs. Firefox 65 supports the WebP image format, and support for AV1, an open and royalty-free video compression format, is shipping now in Firefox 65 for Windows.
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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!
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Firefox Focus with GeckoView
Firefox Focus is a mobile app for ad-free, private browsing. The upcoming release of Focus for Android will come bundled with Gecko, the browser engine that powers Firefox Quantum. Help us test Gecko in Focus today by installing the Focus Beta.
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Variable Fonts Arrive in Firefox 62
Firefox 62 adds support for Variable Fonts, an exciting new technology that makes it possible to create beautiful typography with a single font file. Variable fonts are now supported in all major browsers. And because great features deserve great tools, we’re hard at work building an all new Font Editor into the Firefox DevTools for Firefox 63. Or check it out today in Firefox Nightly.
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New in Firefox 61: Developer Edition
The latest release -- Firefox 61 Developer Edition -- comes with a darker dark theme, more powerful and customizable developer tools, the new Accessibility Inspector, and numerous performance improvements like better CSS stylesheet parsing and improved time to first paint.
