Examine source code of Booth Companion

{
  "manifest_version": 2,
  "name": "Booth Companion",
  "short_name": "Booth Comp",
  "version": "2.20",
  "description": "Booth Companion: convert currencies, check bundles & favorites, and customize your shopping.",
  "permissions": [
    "storage",
    "*://*.booth.pm/*",
    "*://booth.pm/*",
    "https://booth-companion.com/api/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_security_policy": "script-src 'self'; object-src 'self';",
  "content_scripts": [
    {
      "matches": [
        "*://*.booth.pm/*",
        "*://booth.pm/*"
      ],
      "js": [
        "analytics-preload.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://*.booth.pm/*",
        "*://booth.pm/*"
      ],
      "js": [
        "lang.js",
        "customizer.js",
        "themeCodec.js",
        "script.core.js",
        "script.wishlist.js",
        "script.ui.js",
        "script.i18n.js",
        "script.translations.js",
        "script.price-watch.js",
        "script.avatar.js",
        "script.main.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "https://accounts.booth.pm/library*"
      ],
      "js": [
        "script.library-export.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "booth_plugin@petrilionis.lt",
      "strict_min_version": "109.0"
    }
  }
}