reactjs-webextensions-manifest.json

{
  "description": "Bundle ReactJS as web extension",
  "manifest_version": 2,
  "name": "web-ext-react-hello",
  "version": "1.0",
  "homepage_url": "https://github.com/mrloop/web-ext-react-hello",
  "icons": {
    "192": "logo192.png"
  },

  "browser_action": {
    "default_icon": "logo192.png",
    "default_title": "Hello WebExt",
    "default_popup": "popup.html"
  }
}