BrowserOS

er API, and Rewriter API have also been adopted by the W3C WebML Working Group. We've asked asked Mozilla and WebKit for their standards positions. webmachinelearning/webmcp: https://github.com/webmachinelearning/webmcp jasonjmcghee/WebMCP: https://github.com/jasonjmcghee/WebMCP Having worked on at least one web app with a name that started with "Web", I'm not surprised. /? mcp chrome: https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu... : - "Show HN: We packaged an MCP server inside Chromium" (today) https://news.ycombinator.com/item?id=45618536 re: browseros-mcp: https://github.com/browseros-ai/BrowserOS/blob/main/docs/bro... - "Chrome DevTools (MCP) for your AI agent" https://developer.chrome.com/blog/chrome-devtools-mcp .. https://news.ycombinator.com/item?id=45412734 (September 2025) .. : > We're launching today a public preview for the new Chrome DevTools Model Context Protocol (MCP) server, bringing the power of Chrome DevTools to AI coding assistants. > Coding agents face a fundamental problem: they are not able to see what the code they generate actually does when it runs in the browser. They're effectively programming with a blindfold on. > The Chrome DevTools MCP server changes this. AI coding assistants are able to debug web pages directly in Chrome, and benefit from DevTools debugging capabilities and performance insights. This improves their accuracy when identifying and fixing issues. How could the Chrome DevTools MCP be integrated with the Gemini Computer Use model? From https://news.ycombinator.com/item?id=45543923 : > Competency Story: The customer and product owner can write BDD tests in order to validate the app against the requirements > Prompt: Write playwright tests for #token_reference, that run a named factored-out login sequence, and then test as human user would that: when you click on Home that it navigates to / (given browser MCP and recently the Gemini 2.5 Computer Operator model) "Introducing the Gemini 2.5 Computer Use model" (October 2025) https://blog.google/technology/google-deepmind/gemini-comput... Could this help with accessibility reviews? "Lighthouse accessibility score" https://developer.chrome.com/docs/lighthouse/accessibility/s... awesome-a11y > Tools: https://github.com/brunopulis/awesome-a11y/blob/main/topics/...

-devtools-mcp which starts a fresh headless instance each time) 3. our MCP server also exposes new APIs from Chromium's C++ core to click, type, and draw bounding boxes on a webpage. Our APIs are also not CDP-based (Chrome Debug Protocol) and have robust anti-bot detection. -- Few example use cases for BrowserOS-mcp are: a) *Frontend development with Claude Code*: instead of screenshot‑pasting, claude-code gets WYSIWYG access. It can write code, take a screenshot, check console logs, and fix issues in one agentic sweep. Since it has your sessions, it can do QA stuff like "test the auth flow with my Google Sign‑In." Here's a video of claude-code using browserOS to improve the css styling with back-and-forth checking: https://youtu.be/vcSxzIIkg_0 b) *Use as an agentic browser:* You can install BrowserOS-mcp in claude-code or Claude Desktop and do things like form-filling, extraction, multi-step agentic tasks, etc. It honestly works better than Perplexity Comet! Here's a video of claude-code opening top 5 hacker news posts and summarizing: https://youtu.be/rPFx_Btajj0 -- *How we packaged MCP server inside Chromium binary*: We package the server as a Bun binary and expose MCP tools over HTTP instead of stdio (to support multiple sessions). And we have a BrowserOS controller installed as an extension at the application layer which the MCP server connects to over WebSocket to control the browser. Here's a rough architecture diagram: https://dub.sh/browseros-mcp-diag -- *How to install and use it:* We put together a short guide here: https://git.new/browseros-mcp Our vision is to reimagine the browser as an operating system for AI agents, and packaging an MCP server directly into it is a big unlock for that! I'll be hanging around all day, would love to get your feedback and answer any questions!