OpenAI launches Codex Chrome extension
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- OpenAI launched a Chrome extension for its Codex platform on May 7 2026, adding browser‑based development capabilities.
- Codex can now test web apps, gather context across open tabs, and use Chrome DevTools in parallel while users work on other tasks.
- OpenAI says the extension should broaden Codex’s appeal to casual users and non‑developer professions that rely on browser‑based computing.
- OpenAI previously released Codex as a macOS app in February 2026 and added new features in April 2026 before the Chrome rollout.
- Chrome extension runs on both Windows and Mac, and OpenAI plans a future combined app that will unite Codex, ChatGPT, and Atlas.
Why it matters: The extension gives developers and casual users a browser‑based AI coding assistant, expanding Codex’s reach beyond traditional development environments. It also runs on Windows and Mac, aligning with OpenAI’s upcoming future combined app that will unite Codex, ChatGPT, and Atlas.
