Examine source code of Model Wishlister

{
  "manifest_version": 3,
  "name": "Model Wishlister",
  "version": "1.1",
  "description": "Add kits to a universal list.",
  "permissions": [
    "storage",
    "scripting",
    "activeTab"
  ],
  "action": {
    "default_icon": {
      "48": "icon.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.usagundamstore.com/*",
        "*://usagundamstore.com/*",
        "*://*.gundamplacestore.com/*",
        "*://gundamplacestore.com/*",
        "*://*.newtype.us/*",
        "*://newtype.us/*",
        "*://*.gundamplanet.com/*",
        "*://gundamplanet.com/*",
        "*://*.sidesevenexports.com/*",
        "*://sidesevenexports.com/*",
        "*://*.p-bandai.com/*",
        "*://p-bandai.com/*",
        "*://amiami.com/*",
        "*://*.amiami.com/*"
      ],
      "js": [
        "scripts/scrapers/baseScraper.js",
        "scripts/scrapers/GundamPlaceStore.js",
        "scripts/scrapers/GundamPlanetStore.js",
        "scripts/scrapers/NewtypeStore.js",
        "scripts/scrapers/PBandaiStore.js",
        "scripts/scrapers/SideSevenExportsStore.js",
        "scripts/scrapers/UsaGundamStore.js",
        "scripts/scrapers/AmiamiStore.js",
        "scripts/buttonInjector.js"
      ],
      "css": [
        "styles/wishlistStyles.css",
        "styles/buttonStyles.css"
      ],
      "run_at": "document_start"
    }
  ],
  "background": {
    "scripts": [
      "scripts/wishlistLauncher.js"
    ],
    "type": "module"
  },
  "host_permissions": [
    "*://*.usagundamstore.com/*",
    "*://usagundamstore.com/*",
    "*://*.gundamplacestore.com/*",
    "*://gundamplacestore.com/*",
    "*://*.newtype.us/*",
    "*://newtype.us/*",
    "*://*.gundamplanet.com/*",
    "*://gundamplanet.com/*",
    "*://*.sidesevenexports.com/*",
    "*://sidesevenexports.com/*",
    "*://*.p-bandai.com/*",
    "*://p-bandai.com/*",
    "*://amiami.com/*",
    "*://*.amiami.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{32df04f2-e476-473e-ae1c-fb7976d1850c}"
    }
  }
}