eposWeb Extension Engine

The opinionated engine for extension developers who want to skip the boilerplate and ship faster.

Simple Setup

Connect a local folder, add a small config file, and run your code directly in the browser.

Keep data in sync across popup, background, side panel, web pages, and iframes. Changes are also persisted between sessions.

Send messages across the whole extension without building separate routes for popup, background, content scripts, and frames.

Use supported Chrome extension APIs in more places, including web pages and iframes.

Store app data, files, blobs, and other binary data in a simple persistent storage.

Load files into the right targets and render page UI inside its own Shadow DOM.