Codex Walked Into Your Browser With Your Cookies
OpenAI dropped a Chrome extension that lets Codex drive the browser using your active sessions. Same Codex you have been pair-programming with, but now it can open LinkedIn while you are signed in, click around Salesforce, read your Gmail, click through your internal admin panels. Available on macOS and Windows in all regions except the EU and UK.
OpenAI says Codex is now at 4 million weekly active users, an 8x jump since January. The company also said the extension exists because, after Computer Use shipped, they saw most agent workloads were ending up in the browser anyway. Putting Codex inside Chrome instead of giving it a separate sandboxed browser is the architectural choice that matters here. Your existing logins are the moat, not the model.
This is the same pattern Perplexity went with for Personal Computer Mac last week (sandbox lives on Perplexity servers) and Comet (sandbox in browser). OpenAI just picked the third option: run inside the user's real Chrome instance. The trust model is different, the security boundary is different, the workflows that unlock are different. If you can read your customer's signed-in pages and click on their behalf, you are now the customer in the eyes of every web app they use.
Get it from developers.openai.com/codex/app/chrome-extension.
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OpenAI says Codex is now at 4 million weekly active users, an 8x jump since January. The company also said the extension exists because, after Computer Use shipped, they saw most agent workloads were ending up in the browser anyway. Putting Codex inside Chrome instead of giving it a separate sandboxed browser is the architectural choice that matters here. Your existing logins are the moat, not the model.
This is the same pattern Perplexity went with for Personal Computer Mac last week (sandbox lives on Perplexity servers) and Comet (sandbox in browser). OpenAI just picked the third option: run inside the user's real Chrome instance. The trust model is different, the security boundary is different, the workflows that unlock are different. If you can read your customer's signed-in pages and click on their behalf, you are now the customer in the eyes of every web app they use.
Get it from developers.openai.com/codex/app/chrome-extension.
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