Build Your First Chrome Extension
A Complete Practical Guide — From Blank Folder to Chrome Web Store
A step-by-step, hands-on guide that takes you from "I've never built an extension" to "my extension is live in the Chrome Web Store." No filler, no theory — just code and shipping.
Companion GitHub repo with every code example
Download the full EPUB — free while in reviewFree download — no signup, no email. Paid edition ($9.99) coming once our payment setup is live.
Hands-On
Build a real extension from start to finish. Context menu, popup, keyboard shortcuts, options page — every feature is coded step by step.
Publication Ready
Includes a chapter on the Chrome Web Store submission process with permission justification templates and the pre-publish checklist.
Cross-Browser
Covers Firefox porting, MV3 service workers vs event pages, and the offscreen document workaround for clipboard access.
Open Source Code
Every code example is available on GitHub under MIT license. Fork, modify, and ship without attribution.
What You'll Learn
- Understanding Chrome Extension Architecture — MV3, service workers, permissions, lifecycle
- Your First Extension — Hello World — manifest.json, background.js, offscreen document
- The Popup — Your Extension's UI — HTML popup with user interaction
- Keyboard Shortcuts — Commands for power users
- Persisting User Settings — chrome.storage, custom cleanup rules
- The Options Page — Full-page configuration interface
- Icons and Branding — Creating your extension's identity
- Publishing to the Chrome Web Store — Developer account, listing, review process
- Testing and Debugging — Service worker, popup, and unit tests
- From Lite to Production — Firefox port, premium features, analytics
Plus: Complete manifest.json reference, permissions guide, and pre-publish checklist.
Frequently Asked Questions
Do I need to know JavaScript?
Yes, basic JavaScript is expected. You should be comfortable with functions, variables, and callbacks. Experience with HTML and CSS helps but isn't strictly required.
How long does it take to complete the guide?
About 2-3 hours to build the complete extension. The Chrome Web Store submission adds 1-3 business days for review.
Is this book up to date with Manifest V3?
Yes. Everything in this book uses Manifest V3, which is required for all new Chrome extensions since 2023.
Can I use this to build a paid extension?
Absolutely. Chapter 10 covers premium features and monetization options including license keys and Chrome Web Store purchases.
What if I get stuck?
The companion GitHub repo has the complete source code for every step. Each chapter's code is in a separate folder so you can jump ahead or backtrack.
Ready to Build?
Grab the complete e-book free while we set up the paid edition.
Download the EPUBPaid edition: $9.99 (coming) · Companion code on GitHub