Examine source code of Maze Scoreboard

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "1.0",
  "description": "__MSG_extensionDescription__",
  "permissions": [],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "extension_id": "maze-game1@yourdomain.com",
  "browser_specific_settings": {
    "gecko": {
      "id": "{72403f2d-4132-4105-98a5-703f1638f876}"
    }
  }
}