Blog

The ExtensionFast blog

Practical guides on building, launching, and monetizing Chrome extensions, from your first idea to your first paying users.

Cartoon developer building an AI-powered Chrome extension from the ground up
Featured · Complete Guide

How to Build an AI Chrome Extension From Scratch (Complete 2026 Guide)

The complete 2026 guide to building an AI-powered Chrome extension from scratch: finding an AI-worthy idea, wiring up an LLM, keeping your API key safe, controlling token costs, passing Web Store review, and getting your first users.

13 min read·Updated June 21, 2026
Read the full guide

All articles

Building·June 21, 2026·8 min read

How to Build a Volume Booster Chrome Extension in 2026 (Web Audio Guide)

Build a volume booster Chrome extension with Manifest V3 and the Web Audio API. A code-first guide to tab audio capture, the GainNode, the offscreen document, and the gotchas.

Building·June 18, 2026·10 min read

How Much Does It Cost to Hire a Chrome Extension Developer? (2026)

What it really costs to hire a Chrome extension developer in 2026: freelance and agency rates, what drives the price, where to find good developers, how to vet them, and when building it yourself is the cheaper, faster option.

Building·June 14, 2026·9 min read

Chrome Extension Boilerplate: The Fastest Way to Ship a Paid Extension in 2026

What a Chrome extension boilerplate is, what a good one includes (Manifest V3, React, TypeScript, auth, payments, cross-browser), and how to choose between building from scratch and starting from a ready-made starter kit in 2026.

Building·June 14, 2026·8 min read

What Is a Chrome Extension? A Plain-English Guide for 2026

A clear, beginner-friendly explanation of what a Chrome extension is, what extensions can do, how they work under the hood, whether they are safe, and how to build your own in 2026.

Growth·June 13, 2026·11 min read

How to Use AI to Market Your Chrome Extension in 2026

A practical 2026 playbook for using AI to market your Chrome extension: positioning, Web Store listing copy, an SEO content engine, social and community presence, demo assets, review mining, and lifecycle email — without sounding like a robot.

Growth·June 12, 2026·3 min read

How the Chrome Web Store Ranking Algorithm Works in 2026

How the Chrome Web Store ranking algorithm works in 2026, and the factors that actually move your extension up the rankings: installs, ratings, retention, and keywords.

Growth·June 12, 2026·3 min read

What Happens After Your Chrome Extension Hits 1,000 Users

Hitting 1,000 Chrome extension users changes everything: retention, revenue, support load, and the cracks in your foundation. Here is what to expect and how to prepare.

Building·June 12, 2026·3 min read

Chrome vs Edge vs Firefox: Best Browser for Extensions in 2026

Chrome, Edge, or Firefox for your 2026 extension? Compare market share, AI features, store reach, and developer experience to pick the best browser to build on.