Web Developers Articles
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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 security enhancing API, advancing a safer web for everyone. We […]
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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, Microsoft, and Mozilla, takes proposals of features that are well defined in a sufficiently stable web standard, and have good test suite coverage. Then, we come […]
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Launching Interop 2025
Interop 2025 continues the mission to make the web more consistent across browsers, building on 2024’s 95% interoperability score. This year, 19 focus areas target key developer needs and long-standing issues, including WebRTC improvements, Storage Access API, and CSS Zoom.
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Announcing Official Puppeteer Support for Firefox
We’re pleased to announce that, as of version 23, the Puppeteer browser automation library now has first-class support for Firefox. This means that it’s now easy to write automation and perform end-to-end testing using Puppeteer, and run against both Chrome and Firefox.
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Announcing Interop 2024
Following the success of Interop 2023, we are pleased to confirm that the project will continue in 2024 with a new selection of focus areas, representing areas of the web platform where we think we can have the biggest positive impact on users and web developers.
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Version 100 in Chrome and Firefox
Chrome and Firefox will reach version 100 in a couple of months. This has the potential to cause breakage on sites that rely on identifying the browser version to perform business logic. This post covers the timeline of events, the strategies that Chrome and Firefox are taking to mitigate the impact, and how you can help.
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Hopping on Firefox 91
August is already here, which means so is Firefox 91! For developers, Firefox 91 supports the Visual Viewport API and Intl.DateTimeFormat object additions.
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Improving Cross-Browser Testing, Part 2: New Automation Features in Firefox Nightly
It’s clear that WebDriver needs to grow to meet the capabilities of DevTools-based automation. However, that process will take time, and we want more developers to be able to run their automated tests in Firefox today. To that end, we have shipped an experimental implementation of parts of CDP in Firefox Nightly, specifically targeting the use cases of end-to-end testing using Google’s Puppeteer, and the CDP-based features of Selenium 4.
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Improving Cross-Browser Testing, Part 1: Web Application Testing Today
Testing web applications can be a challenge. At Mozilla, we see that as a call to action. With our commitment to building a better Internet, we want to provide web developers with the tools they need to build great web experiences – including great tools for testing. In this series of posts, we will explore the current web-application testing landscape and explain what Firefox is doing today to allow developers to run more kinds of tests in Firefox.
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To Eleventy and Beyond
Porting an established static website from one generator to another can be daunting. In this post, Add-ons Engineering Manager Stuart Colville recounts the experience of migrating Firefox Extension Workshop, Mozilla’s site for Firefox-specific extension development resources, from the Ruby-based site generator Jekyll to JavaScript-based Eleventy.
