A small superpower in your browser.
An extension adds a feature to every page you visit. It's a few files and a manifest that lists what it's allowed to do.
Starter Prompt
Build a Chrome extension (Manifest V3) that finds South African phone numbers on the current page, highlights them, and copies one when I click it. Only run when I click the extension button.
You'll Learn
Level
The manifest, permissions, and loading your own extension through chrome://extensions in developer mode.
Done when
It works on three different sites
It only runs when you click it
Permissions list is short
No data leaves the browser
Sources: Chrome for Developers ↗ · Chrome for Developers ↗
Ask for the least access that works.