Examine source code of DropMail-v2

{
  "manifest_version": 3,
  "name": "DropMail",
  "version": "2.1.0",
  "description": "Multi-provider disposable email. Fast, private, powerful.",
  "permissions": [
    "storage",
    "alarms",
    "notifications",
    "clipboardWrite"
  ],
  "host_permissions": [
    "https://api.mail.tm/*",
    "https://www.guerrillamail.com/*",
    "https://harakirimail.com/*",
    "https://maildrop.cc/*",
    "https://www.dispostable.com/*",
    "https://inboxes.com/*",
    "https://yopmail.com/*",
    "https://www.mailinator.com/*",
    "https://10minutemail.com/*",
    "https://www.throwam.com/*"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "dropmail-v2-app@krishnakiran.dev",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}