do you need the 1password macOS app to use the browser extension?

Hello ComfortableMilk4454! 👋

Thanks for reaching out! You can certainly use 1Password in the browser without the desktop app. While the desktop app does add other features, like the ability to unlock 1Password using Touch ID and an Apple Watch, the browser extension can be used by itself. This guide will help your friend get started once she's signed up for 1Password: Get to know 1Password in your browser

i want to gift her 1password

That's a thoughtful idea! You can find gift cards here. 🙂

-Dave