September 18, 2026
ChatGPT is ready for browser testing: the desktop app gets extensions and CDP
On September 18, 2026, OpenAI added extensions to the built-in ChatGPT browser for macOS and Windows. The browser supports downloads, autofill, and password management. Developer mode provides access to CDP in Chrome and the built-in browser for working with the DOM, console, and network requests.
🚨 AI News | TestingCatalog
@testingcatalog
OPENAI 🔥: extensions are now supported in the ChatGPT desktop browser! Alright, that was the final touch. Why would anyone need another browser now? The ChatGPT browser now has both extensions and the ability to work through CDP (control the DOM). Looks like it is time to use the ChatGPT browser as the default for testing 👀
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The built-in ChatGPT browser did not automatically pick up tabs and the session from regular Chrome. For an existing profile, OpenAI offers a separate extension.
Now. The desktop app supports extensions, downloads, autofill, and password management. Developer mode, available since June 11, provides access to CDP in Chrome and the built-in browser: you can profile JavaScript, inspect the console, network requests, DOM, and applied styles.
Setup. Update the app, open Settings → Computer Use, select a browser, install the extension from the store, and check its status in Manage. In a Work or Codex chat, select the browser via @mention. The extension works in five browsers: Chrome, Edge, Brave, Opera, and Vivaldi. Sidebar chat is available in four of them, excluding Opera.
The ChatGPT browser is becoming a standalone workspace for tests and tab-based tasks, not just a window inside chat.
