Examine source code of Youtube Cursor

{
  "name": "Youtube Cursor",
  "version": "1.3.1",
  "manifest_version": 2,
  "description": "Puts cursor into search bar",
  "browser_action": {},
  "permissions": [
    "activeTab",
    "tabs",
    "https://*.youtube.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://*.youtube.com/*"
      ],
      "run_at": "document_start",
      "all_frames": true,
      "js": [
        "inject.js"
      ]
    }
  ],
  "icons": {
    "12": "icon.svg",
    "24": "icon.svg",
    "48": "icon.svg",
    "96": "icon.svg",
    "192": "icon.svg"
  }
}