Codex Computer Use for Firefox by Dara A.

Bring Codex computer-use capabilities and its signed-in sidebar to Firefox and Zen Browser.

Experimental

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About this extension

Codex Computer Use for Firefox and Zen Browser brings the OpenAI browser-extension workflow to Firefox-family browsers through a normal WebExtension.

The compatibility layer translates the browser-control operations used by Codex into Firefox APIs while retaining the signed-in sidebar experience. It supports semantic page inspection, clicks, typing, keyboard and pointer input, screenshots, navigation, downloads and uploads, cookies, nested cross-origin frames, network inspection, request interception, device emulation, and common JavaScript dialogs.

Zen Browser was the primary live-test target. Automated protocol tests and live signed-in computer-use acceptance tests are documented in the public repository.

This is an independent compatibility project and is not an official OpenAI, Mozilla, or Zen Browser release. An existing ChatGPT/Codex installation and account are required.

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Permissions and data

Required permissions:

Exchange messages with programs other than Firefox
Read and modify bookmarks
Clear recent browsing history, cookies, and related data
Download files and read and modify the browser’s download history
Access browsing history
Display notifications to you
Access recently closed tabs
Access browser tabs
Access browsing history
Access browser activity during navigation
Access your data for all websites

Optional permissions:

Open files downloaded to your computer
Access your data for all websites

Required data collection, according to the developer:

Website activity
Website content

Optional data collection, according to the developer:

Bookmarks
Browsing activity
Search terms