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Set up NextBrowser on Windows with Codex

Install NextBrowser on Windows, pair your account, connect Codex and verify a first browser session from the desktop workspace.

About this reference video

This is a reference recording of standalone Clawbrowser installation on Windows, not a walkthrough of the NextBrowser installer. The current instructions below use NextBrowser browser pairing and its managed browser tools. Do not repeat the API-key prompt or standalone installation commands from the video as NextBrowser setup.

Go to the NextBrowser workflow ↓
Published · @next_ossaiWatch on YouTube ↗

Overview

NextBrowser combines a managed browser session with a local agent. On Windows, the setup has three separate checks: the NextBrowser account is paired, the browser profile can open a page, and Codex can inspect that page. Passing one check does not establish the others.

What happens in the video

Codex reads the installation instructions and uses the Windows standalone installer. It corrects an empty standard-input attempt while configuring the API key, then launches the browser. The final frames show passing fingerprint and proxy verification checks.

Before you start

  • A Windows machine supported by the current NextBrowser release
  • A NextBrowser account and browser access to approve pairing
  • Access to the service used by Codex and permission to install its local runtime

Run this in NextBrowser

Follow these steps in your own NextBrowser workspace. The video summary records the source demonstration; your result needs the checks below.

  1. Install the Windows desktop app

    Open the NextBrowser documentation and follow its latest-release link. Choose the Windows build for your machine, install it and launch NextBrowser. Use the release assets rather than the standalone runtime installer shown in the recording.

  2. Pair your NextBrowser account

    Choose Sign in to NextBrowser, continue in your browser and approve the pairing request. Return to the desktop app and check account status. The app configures its local browser-control credential; you do not need to paste an API key into Chat or the desktop UI.

  3. Connect Codex

    Install the ChatGPT desktop app and authenticate its Codex agent. NextBrowser uses the Codex executable bundled with that app; a separate Codex CLI installation is not required by this setup. Select Codex in NextBrowser and confirm that it is available and authenticated before assigning a browser task.

  4. Start and inspect the browser profile

    Create or select the intended profile in the sidebar and start its session. Complete the runtime download prompt if one appears. Open https://example.com/ and confirm the active tab and page in Live View. Verify identity if country or proxy consistency matters.

  5. Run a read-only first task

    Send the prompt below to Codex in NextBrowser Chat. Compare the reported URL and page title with Live View. If the task fails, check account connection, traffic, session, active tab and then agent authentication in that order.

Send this prompt in NextBrowser Chat

Suggested prompt

In NextBrowser, confirm the intended profile [profile name] and its running session. Open https://example.com/ if it is not already open. Report the active page URL and title, and leave it visible for me to check in Live View. Do not submit forms or change account settings.

Replace the placeholders, then send this in NextBrowser Chat with the intended profile and agent selected. This is a suggested task, not the recording transcript.

What to verify in your run

  • A paired NextBrowser account and an available Codex runtime
  • A running profile with a visible page whose URL and title match the agent report

Questions about this workflow

Should I follow the API-key instructions in the recording?

No. The recording covers standalone browser tooling. For NextBrowser, use Sign in to NextBrowser and approve browser pairing; the app configures its local credential.

How does NextBrowser connect to Codex?

Install the ChatGPT desktop app and authenticate its Codex agent. NextBrowser uses the Codex executable bundled with that app; a separate Codex CLI installation is not required by this setup.

What if the agent cannot see the page?

Check the actual selected profile, running session, active tab and page state before changing agent configuration. Profile selection is context for the agent, not technical containment. Use the troubleshooting guide if the mismatch persists.

Keep exploring

NextBrowser documentation

NextBrowser documentation ↗Product guide: profiles, agents and sessions ↗NextBrowser session and agent troubleshooting ↗

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