Computer & browser use in Codex (5 real examples)

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Computer & browser use in Codex (5 real examples)

How I AI

Jul 22

Overview Shownote

Highlights

Transcript

Chapters

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Unprocessed episode, you can be the first!

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:

How browser use and computer use work, and why the Codex desktop app plus Chrome extension is the combo I rely on
How I use Codex to QA my onboarding flow, including exhaustive mobile testing I would never do manually
Why under-prompting frontier models gets better results than detailed step-by-step instructions
How my husband EJ Lawless’s persona-impersonation trick surfaces friction points I can’t see as the builder
How I use browser use to get through my LinkedIn inbox without touching it myself
How I had Codex shop Free People’s sale and add 10 medium items to my cart (breastfeeding-friendly and Hawaii-ready)
How computer use can control iPhone mirroring so your Mac can technically operate your phone
Three more computer-use shortcuts: filling annoying forms, creating Google Sheets mid-workflow, and managing router

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Brought to you by:

Runway—The creative AI platform for images, video and more

Hyperagent—Deploy fleets of agents that handle real work

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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