Examine source code of Write Mail AI

{
  "manifest_version": 3,
  "name": "Write Mail AI",
  "version": "1.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "{48d091df-fc92-4b77-ae5e-7cb45758ff7b}",
      "strict_min_version": "58.0"
    }
  },
  "description": "Write Mail AI is an advanced email writing assistant powered by artificial intelligence. It offers free access without the need to log in.",
  "icons": {
    "16": "images/icon-16.png",
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "action": {},
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab"
  ]
}