Examine source code of Iconify

{
  "name": "Iconify",
  "version": "1.0.7",
  "description": "Upgrade your designs with our browser extension! Download premium SVG icons and stickers.",
  "manifest_version": 3,
  "icons": {
    "32": "./icons/32.png",
    "48": "./icons/48.png",
    "128": "./icons/128.png",
    "256": "./icons/256.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.flaticon.com/*",
        "https://iconscout.com/*",
        "https://icons8.com/*",
        "https://fontawesome.com/*"
      ],
      "js": [
        "./scripts/iconify-jquery.js",
        "./scripts/iconify-assets.js",
        "./scripts/iconify-snackbar.js",
        "./scripts/iconify-main.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4e24e0b1-9786-4e37-b301-816f4fb5a4d5}"
    }
  }
}