Examine source code of myWorld Plug-in

{
  "version": "2.3.1",
  "manifest_version": 2,
  "name": "myWorld Plug-in",
  "description": "myWorld Plug-in: Never miss out on Cashback and Shopping Points at online Partners of the myWorld Benefit Program again",
  "browser_specific_settings": {
    "gecko": {
      "id": "cbb@cashbackworld.com"
    }
  },
  "permissions": [
    "tabs",
    "storage",
    "identity",
    "alarms",
    "webNavigation",
    "management",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.bundle.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "neutral_32.png"
  },
  "icons": {
    "32": "neutral_32.png",
    "48": "neutral_48.png",
    "128": "neutral_128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*",
        "<all_urls>"
      ],
      "js": [
        "contentScript.bundle.js"
      ],
      "css": [
        "contentScript.css"
      ],
      "run_at": "document_end"
    }
  ]
}