Content Env

Injects a small panel showing the extension's environment values into every web page you visit.

Runs on Chrome, Edge, Firefox · Manifest V3 · Surfaces: content script, background service worker · Styling: CSS

Create this project

npx extension@latest create my-content-env --template content-env
cd my-content-env
npm install
npm run dev

Permissions it asks for

  • activeTab
  • scripting
  • <all_urls>

Source on GitHubDocumentation

extension.devDocumentation for extension.dev