Examine source code of Rocket Sidebar Sites

{
  "manifest_version": 2,
  "name": "Rocket Sidebar Sites",
  "description": "Add your own websites to the Firefox sidebar",
  "version": "1.0",
  "sidebar_action": {
    "default_title": "Rocket Sites",
    "default_panel": "sidebar.html",
    "default_icon": "icons/rocket-48.png"
  },
  "icons": {
    "16": "icons/rocket-16.png",
    "32": "icons/rocket-32.png",
    "48": "icons/rocket-48.png",
    "96": "icons/rocket-96.png"
  },
  "permissions": [
    "storage",
    "<all_urls>",
    "tabs",
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_end",
      "all_frames": false
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "content_security_policy": "script-src 'self'; object-src 'self';",
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{67e7a0cf-b607-4415-b6fd-ee5b499cc873}"
    }
  }
}