OpenAI Codex Launches Chrome Extension – Use AI Coding Assistant Directly in Your Browser

OpenAI today launched the Codex for Chrome extension, enabling its AI coding assistant to run directly in the Chrome browser on Mac and PC. Previously, Codex could only invoke the browser via the desktop app for tasks like web testing. The new extension allows Codex to access browser context, cross-tab information, and Web DevTools, and test web applications—all without taking control of the user's browser.

OpenAI noted that after introducing the "computer use" feature in the desktop version of Codex, they observed that most user workflows happen inside the browser. This Chrome extension aims to help Codex handle browser-based tasks that plugins or APIs cannot accomplish more quickly and easily. For example, it can understand web interaction logic across multiple tabs or directly use developer tools to debug front-end code, significantly boosting browser-based development and testing efficiency.

Alongside this update, OpenAI launched a $100-per-month ChatGPT subscription tier for users with heavier Codex use cases. The extension is a key step in making Codex more suited to everyday office needs while still remaining practical for developers. In the future, Codex could become a universal entry point for browser-based automation workflows.

This extension extends Codex's capabilities from the local desktop to the cloud browser environment, aligning with how most developers and office workers actually operate. Combined with the premium subscription plan, OpenAI is building an AI collaboration loop where "the browser becomes the terminal," and its impact across different professional scenarios is worth watching closely.