Browser Extension Explorer by Matt Frisbie

Open source browser extension with dozens of interactive demos. Zero NPM packages, one click install, 100% HTML/JS/CSS.
Learn how the pieces of browser extensions fit together by exploring this open source browser extension.

Each demo shows how various pieces of browser extensions work, and each includes links to the specific source files.

Full source code can be found on Github: https://github.com/msfrisbie/demo-browser-extension