OpenAI shipped a Chrome extension for Codex on Thursday, letting its coding agent operate inside signed-in browser sessions on macOS and Windows. The pitch: Codex can now click through dashboards, fill out CRM updates, and debug web apps without seizing control of the active window.
The extension runs across multiple tabs in the background, grouping each Codex thread into its own Chrome tab group. Users invoke it directly with @Chrome in a prompt, or let Codex pick the tool itself when a task hits a logged-in service like Salesforce, Gmail, or LinkedIn.
OpenAI says Codex now has more than 4 million weekly active users, up roughly 8x since January, though the figure is company-reported with no breakdown of paid versus free seats. The extension is live on the Chrome Web Store at version 1.1.4.
Not everyone gets access. The extension is rolling out everywhere except the EU and UK, with OpenAI saying support for those regions is "coming soon" and offering no firmer date. The launch fits a longer plan to fold Codex, ChatGPT, and OpenAI's Atlas browser into a single app.
Bottom Line
Codex now drives Chrome in the background on macOS and Windows, but EU and UK users wait with no timeline.
Quick Facts
- Launched May 7, 2026
- Runs on macOS and Windows
- Excluded from EU and UK at launch
- 4M+ weekly active users (company-reported)
- Chrome Web Store version 1.1.4
