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Building a Google Chrome Extension with Codex

M
Marcin AI
March 3, 2026 7 min read

TL;DR

I built a Google Chrome extension using Codex that filters out AI content on X. This guide shows you how to do it step-by-step with ease.

Building a Google Chrome Extension with Codex
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Key Takeaways

  • 1Codex simplifies building Chrome extensions.
  • 2You can filter AI content on X with the extension.
  • 3Easily integrate apps like GitHub and Figma.
  • 4Installation is quick via "manage extensions."
  • 5AI Builders is a community for learning and collaboration.

Building a Google Chrome extension can seem daunting, but using Codex makes the process straightforward. I've just created an extension to filter AI content on X, letting human posts shine through. Codeex, an OpenAI vibe coding tool, acts as your IDE for this project.

Building a Google Chrome Extension with Codex — section 1 illustration

Getting Started with Codex

Codex makes starting a Chrome plugin simple, especially if you're looking to hide AI replies on X. In about 15 minutes, you can set up a plugin to analyze replies, score them, and filter out AI content. You can even set scores to determine which replies are highlighted.

Chrome extensions are easy to install. Once you build the plugin, just go to "manage extensions" in Chrome, hit "load unpacked," and your extension is ready.

Integrating Cool Features

One of the perks of using Codex is integrating additional features effortlessly. You can connect apps like GitHub, Figma, or Notion directly in the interface. It also supports automations, allowing integration of calendars, email detection, and various tech stacks.

Adding icons with Codex ensures your extensions load correctly. Often overlooked, these visuals complete the installation process properly.

Testing and Improving Your Extension

Once your extension is functional, test it on X to ensure it effectively highlights AI-generated posts. Whether you're highlighting or hiding posts based on AI scores, this tool lays it out clearly.

The fun lies in customizing features to render AI replies differently, marking them to differentiate AI from real user content. You might choose red highlights or another method to make AI content obvious.

Join the AI Builders Community

AI Builders is a growing community where developers gather to create innovative AI applications. We host hackathons, like the upcoming $6,000 event in March, offering a space for both beginners and advanced developers to collaborate.

If you're keen on joining a collaborative environment while improving your skills, AI Builders is worth considering. With diverse members across numerous countries, it's the hub for AI enthusiasts.

Using Codex to build this Google Chrome extension was a revelation. It demonstrates how powerful and simple creating such tools can be. Whether for fun or to sell and grow into a product, the opportunities are vast for those willing to try.

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Frequently Asked Questions

Begin by opening Codex and setting up a new project. Follow the guided steps to build your Chrome extension.

M

Marcin Teodoru

Author

Hollywood filmmaker turned AI educator. I help non-technical people build real apps with AI — no coding required. 455K+ on TikTok, 37K+ on YouTube. Founder of AI Builders, the fastest-growing VibeCoding community in the world.

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