Examine source code of Character Name Generator

{
  "manifest_version": 2,
  "name": "Character Name Generator",
  "version": "1.0",
  "description": "Generate unique names for your fantasy characters.",
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon.png"
    }
  },
  "icons": {
    "48": "icons/icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{627790c2-9706-4c7b-819c-24b9a0a648d3}"
    }
  }
}