Examine source code of Quote Popup

{
  "manifest_version": 2,
  "name": "Quote Popup",
  "version": "1.0",
  "description": "Displays a popup with a quote about hard work or passive income",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "browser_action": {
    "default_icon": "icons/icon-48.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{c3e75d6b-61bd-4768-b676-6edc6e346c09}"
    }
  }
}