Examine source code of USD to BDT in AdSense

{
  "manifest_version": 3,
  "name": "USD to BDT in AdSense",
  "version": "3.0.2",
  "description": "View Google AdSense Earnings in Bangladeshi Taka (BDT)",
  "author": "Gamitisa",
  "developer": {
    "name": "Gamitisa",
    "url": "https://gamitisa.com"
  },
  "homepage_url": "https://gamitisa.com",
  "icons": {
    "16": "icons/icon16.png",
    "24": "icons/icon24.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "64": "icons/icon64.png",
    "96": "icons/icon96.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_title": "USD to BDT in AdSense",
    "default_icon": {
      "19": "icons/icon19.png",
      "38": "icons/icon38.png"
    },
    "default_popup": "ui.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.google.com/adsense/*"
      ],
      "js": [
        "usd-bdt.js"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "ui.html",
    "browser_style": false
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://*.google.com/adsense/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3ef9430f-7a75-463d-a2ca-b36a7beefb7d}",
      "strict_min_version": "109.0"
    },
    "gecko_android": {}
  }
}