Examine source code of Quote Collector

{
  "manifest_version": 2,
  "name": "Quote Collector",
  "version": "1.0",
  "description": "Save your favorite quotes from the web.",
  "permissions": [
    "storage",
    "activeTab"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e1b07b26-6771-474b-b2ed-a3c6b5493748}"
    }
  }
}