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 onHow I use Codex to QA my onboarding flow, including exhaustive mobile testing I would never do manuallyWhy under-prompting frontier models gets better results than detailed step-by-step instructionsHow my husband EJ Lawless’s persona-impersonation trick surfaces friction points I can’t see as the builderHow I use browser use to get through my LinkedIn inbox without touching it myselfHow 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 phoneThree 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 moreHyperagent—Deploy fleets of agents that handle real work—In this episode, we cover:

Intro

What browser use and computer use actually are

Why I use Codex specifically and how the desktop app plus Chrome extension works

Use case 1: QA testing my onboarding flow

Results: 11 issues, one high-severity blocker, one Google Sheet with screenshots

Use case 2: persona testing

Use case 3: LinkedIn inbox, hands-free

Use case 4: AI personal shopper

Rapid-fire uses: forms, iPhone mirroring, router access from out of state, Google Docs