Examine source code of Dynamic HI3 Background

{
  "manifest_version": 2,
  "name": "Dynamic HonKai Impact 3rd Background",
  "version": "1.0",
  "description": "Change new tab wallpaper with random video with Google search bar.",
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{761a62e0-a2c0-48c6-beb0-2fb443b6abf8}"
    }
  }
}