Everything you need to build browser extensions.
Dive right in with comprehensive examples, open source tools, modern frameworks, and cutting-edge platforms.


Building Browser
Extensions
Browser Extension
Explorer
Available Fall 2022
INSTALLThe complete reference for building modern browser extensions in Chrome, Firefox, Edge, and Safari.
Open source browser extension with dozens of browsable demos. Zero NPM packages, one click install, 100% HTML/JS/CSS.