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I let Codex control my browser so I don't have to

Today I’m walking you through one of my absolute favorite AI features right now: browser and computer use via Codex (the ChatGPT desktop app). I use this every single day, personally and professionally, and I wanted to share the specific workflows I’ve built, the moments that surprised me, and the mental model that makes it actually click. *What you’ll learn:* 1. How browser use and computer use work, and why the Codex desktop app plus Chrome extension is the combo I rely on 2. How I use Codex to QA my onboarding flow, including exhaustive mobile testing I would never do manually 3. Why under-prompting frontier models gets better results than detailed step-by-step instructions 4. How my husband EJ Lawless’s persona-impersonation trick surfaces friction points I can’t see as the builder 5. How I use browser use to get through my LinkedIn inbox without touching it myself 6. How I had Codex shop Free People’s sale and add 10 medium items to my cart (breastfeeding-friendly and Hawaii-ready) 7. How computer use can control iPhone mirroring so your Mac can technically operate your phone 8. Three more computer-use shortcuts: filling annoying forms, creating Google Sheets mid-workflow, and managing router *Brought to you by:* Runway—The creative AI platform for images, video and more: https://runwayml.com/howIAI Hyperagent—Deploy fleets of agents that handle real work: https://www.hyperagent.com/howiai *In this episode, we cover:* (00:00) Intro (01:46) What browser use and computer use actually are (03:08) Why I use Codex specifically and how the desktop app plus Chrome extension works (04:15) Use case 1: QA testing my onboarding flow (10:41) Results: 11 issues, one high-severity blocker, one Google Sheet with screenshots (12:10) Use case 2: persona testing (18:20) Use case 3: LinkedIn inbox, hands-free (20:37) Use case 4: AI personal shopper (23:47) Rapid-fire uses: forms, iPhone mirroring, router access from out of state, Google Docs (26:50) Wrap-up *Tools referenced:* • Codex (ChatGPT desktop app): https://openai.com/codex • Claude desktop app: https://claude.ai/download • Monologue (voice dictation for AI): https://monologue.app • iPhone mirroring (Apple): https://support.apple.com/en-us/111775 • Google Sheets: https://sheets.google.com *Other references:* • Jesse Genet episode (How I AI): https://www.lennysnewsletter.com/p/5-openclaw-agents-run-my-home-finances?utm_source=publication-search *Where to find Claire Vo:* ChatPRD: https://www.chatprd.ai/ Website: https://clairevo.com/ LinkedIn: https://www.linkedin.com/in/clairevo/ X: https://x.com/clairevo _Production and marketing by https://penname.co/._ _For inquiries about sponsoring the podcast, email jordan@penname.co._

Claire Vohost
Jul 22, 202627mWatch on YouTube ↗

At a glance

WHAT IT’S REALLY ABOUT

Hands-free AI browser control with Codex for work and life

  1. Codex’s desktop app plus Chrome extension enables AI to control mouse, keyboard, and web navigation via @browser, @chrome, and @computer modes.
  2. Claire showcases an AI-driven QA workflow that tests a web onboarding flow across desktop and mobile, captures screenshots, and outputs a prioritized Google Sheet of issues.
  3. She applies “persona testing” by having the agent use her product as a PM, engineer, and team lead, then produce a research-style critique highlighting friction points and missing mental models.
  4. Productivity examples include hands-free LinkedIn inbox triage and drafting replies despite the lack of an official LinkedIn API/MCP integration.
  5. Personal “digital toil” reductions include AI shopping that adds items to cart, filling tedious forms, controlling an iPhone via mirroring, and handling router/remote-access tasks while out of state.

IDEAS WORTH REMEMBERING

5 ideas

Treat AI as a virtual coworker who can operate your UI.

With Codex computer/browser use, the model can click, type, resize viewports, and navigate flows end-to-end, turning manual web interactions into delegated work.

Automated QA is most valuable for edge cases you don’t naturally test.

Claire’s agent found a high-severity blocker (missing required-field validation) because it intentionally explored failure states that a human “happy path” tester might skip.

Ask for structured outputs (Sheets/Docs) to make results immediately actionable.

Having the agent compile findings into a Google Sheet with repro steps, severity, and embedded screenshots creates a ready-made bug tracker you can hand to yourself or other agents.

Persona testing surfaces expectation gaps, not just UI bugs.

Running PM→Engineer→Team lead flows revealed a conceptual break: the agent expected to reference/@mention an existing PRD across threads, exposing a product-model mismatch.

Under-prompting can improve results with frontier models.

Claire notes that broad instructions like “QA the onboarding flow” can outperform overly prescriptive checklists, because the model plans more intelligently and adapts as it explores.

WORDS WORTH SAVING

5 quotes

So imagine you have a virtual coworker, and that coworker can put its hands on your keyboard and get stuff done on your computer.

— Claire Vo

Now, this sounds really scary, but in fact, it has been one of the most life-changing features of AI.

— Claire Vo

I actually found that under-prompting these models gets you a much better effect than over-prompting them.

— Claire Vo

Sometimes we put AI to use for us, and then sometimes we need AI to put us to use, and so sometimes I am just the human verification layer on top of ChatGPT browser use.

— Claire Vo

Everything is computer, and I really think that this is gonna change how we interface with our digital lives.

— Claire Vo

What “browser use” and “computer use” mean in practiceCodex desktop app + Chrome extension setupInvocation modes: @browser vs @chrome vs @computerAI-assisted QA/testing for web onboarding flowsAutomated issue logging to Google Sheets with screenshotsPersona-based product/usability critiqueHands-free workflows: LinkedIn, shopping, forms, phone mirroring, router access

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