I'm Patrick, a product manager on the Edge team at Microsoft. I do developer relations, and work on a wide range of web platform technologies and tools. Previously, I worked at Mozilla, on the Firefox DevTools team.
I'm part of the Open Web Docs governing committee and a co-chair of the W3C WebDX community group. I also run DevTools Tips.
I have 20+ years of working experience with the web and have worked as a designer, web developer, software engineer, browser engineer, engineering manager, and product manager.
To get in touch, use the links to my social networks at the bottom of this page, or email me: patrickbrosset at gmail dot com.
Calling for Interop 2026 proposals
You can now create Interop 2026 proposals! Interop has been running for 5 years, and is an important tool for companies building browser engines to improve the state of interoperability on the web. Something we know developers care about the most. Help us find the areas to focus on next year.

AI agents and the web - A proposal to keep developers in the loop
WebMCP is an early proposal that allows web developers to take control of how AI agents use their web pages on behalf of users. In this post, I'm providing a short introduction of the proposal, together with a demo. I'm also calling for feedback! If this sounds interesting, please read on and let me know what you think.

Brick by brick: Help us build CSS Masonry
We're working on implementing CSS Masonry in Chromium and are super excited to announce that it's now ready for developer trial. In this blog post, you'll learn about the syntax that's available for you to try, and get inspired by a bunch of examples.

CSS gap decoration resources
A list of all the resources you will need to learn more about the CSS gap decoration proposal, to try it out in your own projects, and provide feedback.

CSS alignment in block layouts
Testing the align-*
and justify-*
CSS properties in a block layout. View the source code of that page to learn more.

web-features and Baseline (AC 2025)
A short talk at the W3C AC meeting in April 2025, to update the AC on the web-features project and Baseline. Video, slides.

web-features and Baseline - We're feature complete! What's next? (W3C Breakouts Day)
The WebDX Community Group has done a lot of work in 2024 to increase the coverage of its web-features data. Now that the data roughly covers the entire web platform feature set, let's review the work done so far, the use cases that web-features, and Baseline, have unlocked, and let's open it up for discussion on the next important questions to tackle.
Slides
