Examine source code of Twitch Sidebar Hover

{
  "name": "Twitch Sidebar Hover",
  "description": "Twitch Sidebar Hover",
  "version": "0.1",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "icons": {
    "16": "logo16.png",
    "48": "logo48.png",
    "128": "logo128.png"
  },
  "manifest_version": 2,
  "browser_action": {
    "default_icon": "logo.png",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "core.css"
      ],
      "js": [
        "core.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{5f0b9b60-57e4-44c6-86f0-82018416a3da}"
    }
  }
}