Examine source code of Randopedia

{
  "manifest_version": 2,
  "name": "Randopedia",
  "version": "1.1",
  "description": "Opens a random Wikipedia article",
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{53de0096-a317-4db7-9fdf-7e450f74d836}"
    }
  }
}