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New May 21, 2026
Announcing Web Serial Support in Firefox
Support for Web Serial in Firefox 151 for Desktop Firefox can now connect directly to microcontrollers, development boards, 3D printers, power meters, and other serial-connected hardware from the we...
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New May 7, 2026
Behind the Scenes Hardening Firefox with Claude Mythos Preview
Two weeks ago we announced that we had identified and fixed an unprecedented number of latent security bugs in Firefox with the help of Claude Mythos Preview and other AI models. In this post, we...
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New May 5, 2026
Trustworthy JavaScript for the Open Web
The open web is a critical platform for applications that handle highly sensitive data, from private communications to financial transactions and medical records. Traditionally, servers are trusted to...
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New Mar 25, 2026
Firefox Developer Edition and Beta: Try out Mozilla’s .rpm package!
In January, we introduced our Nightly package for RPM-based Linux distributions. Today, we are thrilled to announce it is now available for Firefox Beta! Firefox Beta is great for testing your si...
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New Feb 26, 2026
Why is WebAssembly a second-class language on the web?
This post is an expanded version of a presentation I gave at the 2025 WebAssembly CG meeting in Munich. WebAssembly has come a long way since its first release in 2017. The first version of We...
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New Feb 24, 2026
Goodbye innerHTML, Hello setHTML: Stronger XSS Protection in Firefox 148
Cross-site scripting (XSS) remains one of the most prevalent vulnerabilities on the web. The new standardized Sanitizer API provides a straightforward way for web developers to sanitize untrusted HT...
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New Feb 12, 2026
Launching Interop 2026
The Interop Project is a cross-browser initiative to improve web compatibility in areas that offer the most benefit to both users and developers. The group, including Apple, Google, Igalia, Mi...