Build a Chrome Extension from Scratch
Go from idea to a working, installable Chrome extension in an afternoon, no prior extension experience required.
Download workflow config (JSON)How the data moves
This is a handoff plan, not an automatic integration. Review outputs before the next step. Unlabeled arrows show order, not a verified data format. Use the capability links to explore tool substitutions.
Step 1
Define the Extension's Single Job
Write a one-paragraph brief describing exactly what your extension does on a webpage. The clearer the constraint, the faster the build.
Step 2
Generate the Manifest and File Structure
Paste the brief into Cursor and ask it to generate a manifest.json, popup.html, background.js, and content.js with the correct permissions for your use case.
Step 3
Build the Core Functionality
Work through each file in Cursor, describing the behavior you want and letting the AI implement it. Describe edge cases as you discover them.
Step 4
Design the Popup UI
Ask V0 by Vercel to generate a React or vanilla HTML/CSS popup interface matching your extension's functionality, then paste the output into popup.html.
Step 5
Test and Iterate
Load the extension in Chrome developer mode, test all functionality, and use Cursor to fix any bugs that surface. Ask Perplexity for any Chrome API questions.
Time Required
2–4 hrs
Expected Result
A working Chrome extension installed in developer mode, with core functionality running and ready for testing.
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