Examine source code of Change Quotes

{
  "manifest_version": 2,
  "name": "Change Quotes",
  "version": "1.0",
  "description": "Displays random quotes about change.",
  "icons": {
    "48": "icon48.png",
    "96": "icon96.png",
    "128": "icon128.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon48.png",
      "96": "icon96.png",
      "128": "icon128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4bb31133-f842-42c7-ab0f-0472aff83994}"
    }
  }
}