Examine source code of Calendar Week

{
  "manifest_version": 2,
  "name": "Kalenderwoche",
  "version": "1.0",
  "description": "Zeigt die aktuelle Kalenderwoche und eine Monatsübersicht.",
  "permissions": [
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Kalenderwoche"
  },
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{86873adb-19eb-4519-8697-5177f4dbfb3b}"
    }
  }
}