PACT: Anonymous Credentials for the Web
A deeper look at PACT: a new initiative to tackle the rising tide of CAPTCHAs on the web whilst keeping the web open and preserving user's privacy.
Mozilla Hacks
@mozilla-hacks
Publisher
20
Posts
Posts by Mozilla Hacks
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 web. Starting ...
Behind the Scenes Hardening Firefox with Claude Mythos Preview
New details about what we found, and how agentic harnesses are now able to reproduce real bugs and dismiss false positives.
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 deliver the ...
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 ...
Why is WebAssembly a second-class language on the web?
This post is an expanded version of a presentation I gave at the recent WebAssembly CG meeting in Munich. WebAssembly has come a long way since its first release in 2017. The 1.0 version of WebAssembly was already a great fit for low-level languages like C and C++, and immediately enabled many ne...
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 HTML before inserting it into the DOM. Firefox 148 is the first browser to ship this standardized sec...
Launching Interop 2026
Interop 2025 brought a bunch of new web platform features & fixes, but here's what's coming in 2026…
CRLite: Fast, private, and comprehensive certificate revocation checking in Firefox
Firefox is now the first and the only browser to deploy fast and comprehensive certificate revocation checking that does not reveal your browsing activity to anyone (not even to Mozilla). ...
Improving Firefox Stability in the Enterprise by Reducing DLL Injection
Beginning in version 138, Firefox will offer an alternative to DLL injection for Data Loss Prevention (DLP) deployments in enterprise environments. DLL Injection DLL injection into Firefox is a topic ...
Launching Interop 2025
Interop 2025 continues the mission to make the web more consistent across browsers, building on 2024’s 95% interoperability score.
Introducing Uniffi for React Native: Rust-Powered Turbo Modules
Uniffi for React Native: Mozilla and Filament's open-source tool lets you build high-performance Modules in Rust.
Llamafile v0.8.14: a new UI, performance gains, and more
Introducing Llamafile 0.8.14, Mozilla's open-source AI tool with a new chat interface, faster performance and support for powerful models.
0Din: A GenAI Bug Bounty Program – Securing Tomorrow’s AI Together
Discover 0Din, a pioneering GenAI bug bounty program aimed at securing advanced AI systems. 0Din ensures the ethical and secure use of GenAI.
Announcing Official Puppeteer Support for Firefox
Puppeteer 23 now supports Firefox, simplifying browser automation and testing across both Chrome and Firefox.
Snapshots for IPC Fuzzing
Process separation is crucial to Firefox's security model. Discover our latest tool for finding vulnerabilities: snapshot fuzzing.
Sponsoring sqlite-vec to enable more powerful Local AI applications
Today we’re proud to announce the next Mozilla Builders project: sqlite-vec. This project brings vector search functionality to the SQLite database.
Experimenting with local alt text generation in Firefox Nightly
Firefox 130 will feature an on-device AI model that automatically generates alt-text for images, integrated into its built-in PDF editor.
Llamafile’s progress, four months in
Mozilla’s Innovation group launched the llamafile project last year and it has become one of Mozilla’s most-favorited repositories on GitHub.
Porting a cross-platform GUI application to Rust
The Firefox crash reporter has been ported to Rust, with an architecture supporting native cross-platform GUI rendering.