Examine source code of Hanime Thumbnail Preview

{
  "manifest_version": 3,
  "name": "Hanime Thumbnail Preview",
  "version": "1.2",
  "description": "View video previews on mouse hover on videos. Currenly works on home, trending and search page.",
  "host_permissions": [
    "https://hanime.tv/*"
  ],
  "permissions": [
    "storage"
  ],
  "options_page": "",
  "action": {
    "default_popup": "popup/index.html",
    "default_icon": "hanime1.png"
  },
  "icons": {
    "128": "hanime1.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://hanime.tv/*"
      ],
      "js": [
        "content-ui/index.iife.js"
      ],
      "css": [
        "content-ui.css"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "*.js"
      ],
      "matches": [
        "*://hanime.tv/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "hanime.thumbnail.preview.lazytwinkletoes@gmail.com"
    }
  }
}