Examine source code of Altered Scout - Collection Sync

{
  "manifest_version": 3,
  "name": "Altered Scout - Collection Sync",
  "version": "2.1.0",
  "description": "Sync your Altered TCG Unique collection to alteredscout.com without spreadsheets.",
  "permissions": [
    "activeTab",
    "tabs",
    "scripting",
    "storage"
  ],
  "host_permissions": [
    "https://www.altered.gg/*",
    "https://api.altered.gg/*",
    "https://altered-db.com/*",
    "https://alteredscout.com/*",
    "https://www.alteredscout.com/*",
    "https://*.vercel.app/*",
    "http://localhost:5173/*",
    "http://127.0.0.1:5173/*",
    "http://localhost:3000/*",
    "http://127.0.0.1:3000/*",
    "http://localhost:3001/*",
    "http://127.0.0.1:3001/*"
  ],
  "action": {
    "default_title": "Sync Altered TCG Unique collection to alteredscout.com",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "author": "Gilberto Lenzi",
  "homepage_url": "https://alteredscout.com",
  "browser_specific_settings": {
    "gecko": {
      "id": "collection-sync@alteredscout.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.alteredscout.com/*",
        "https://alteredscout.com/*",
        "https://*.vercel.app/*",
        "http://localhost:5173/*",
        "http://127.0.0.1:5173/*",
        "http://localhost:3000/*",
        "http://127.0.0.1:3000/*",
        "http://localhost:3001/*",
        "http://127.0.0.1:3001/*"
      ],
      "js": [
        "site-bridge.js"
      ],
      "run_at": "document_start"
    }
  ]
}