Examine source code of Weather Sidebar

{
  "manifest_version": 2,
  "name": "Weather Sidebar",
  "version": "1.0",
  "description": "Displays current weather in a sidebar.",
  "permissions": [
    "storage",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Weather Sidebar"
  },
  "sidebar_action": {
    "default_panel": "sidebar.html",
    "default_title": "Weather Sidebar"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a3640996-6331-4f36-b303-c6b60bced39b}"
    }
  }
}