# Computer and browser use in Codex (5 real examples) > Source: > Published: 2026-07-22 12:03:38+00:00 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. **Listen or watch on YouTube, Spotify, or Apple Podcasts** ### 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-size 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 a router ### Brought to you by: ** Runway**—The creative AI platform for images, video, and more ** Hyperagent**—Deploy fleets of agents that handle real work ### In this episode, we cover: ([00:00](https://www.youtube.com/watch?v=lk63Sl-LRKE)) Intro ([01:46](https://www.youtube.com/watch?v=lk63Sl-LRKE&t=106s)) What browser use and computer use actually are ([03:08](https://www.youtube.com/watch?v=lk63Sl-LRKE&t=188s)) Why I use Codex specifically and how the desktop app plus Chrome extension works ([04:15](https://www.youtube.com/watch?v=lk63Sl-LRKE&t=255s)) Use case 1: QA testing my onboarding flow ([10:41](https://www.youtube.com/watch?v=lk63Sl-LRKE&t=641s)) Results: 11 issues, one high-severity blocker, one Google Sheet with screenshots ([12:10](https://www.youtube.com/watch?v=lk63Sl-LRKE&t=730s)) Use case 2: persona testing ([18:20](https://www.youtube.com/watch?v=lk63Sl-LRKE&t=1100s)) Use case 3: LinkedIn inbox, hands-free ([20:37](https://www.youtube.com/watch?v=lk63Sl-LRKE&t=1237s)) Use case 4: AI personal shopper ([23:47](https://www.youtube.com/watch?v=lk63Sl-LRKE&t=1427s)) Rapid-fire uses: forms, iPhone mirroring, router access from out of state, Google Docs ([26:50](https://www.youtube.com/watch?v=lk63Sl-LRKE&t=1610s)) Wrap-up ### Tools referenced: • Codex (ChatGPT desktop app): [https://openai.com/codex](https://openai.com/codex) • Claude desktop app: [https://claude.ai/download](https://claude.ai/download) • Monologue (voice dictation for AI): [https://monologue.app](https://monologue.app) • iPhone mirroring (Apple): [https://support.apple.com/en-us/111775](https://support.apple.com/en-us/111775) • Google Sheets: [https://sheets.google.com](https://sheets.google.com) ### Other reference: • Jesse Genet episode (How I AI): [https://www.lennysnewsletter.com/p/5-openclaw-agents-run-my-home-finances?utm_source=publication-search](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/](https://www.chatprd.ai/) Website: [https://clairevo.com/](https://clairevo.com/) LinkedIn: [https://www.linkedin.com/in/clairevo/](https://www.linkedin.com/in/clairevo/) Production and marketing by [https://penname.co/](https://penname.co/). For inquiries about sponsoring the podcast, email [[email protected]](/cdn-cgi/l/email-protection).