Examine source code of Auth Autofill

{
  "manifest_version": 3,
  "name": "__MSG_extension_name__",
  "version": "3.0.1",
  "default_locale": "en",
  "description": "__MSG_extension_description__",
  "homepage_url": "https://github.com/ParkJeongseop/AuthAutoFill",
  "author": "__MSG_developer__",
  "icons": {
    "128": "icon.png"
  },
  "action": {
    "default_title": "__MSG_extension_name__",
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "js": [
        "autofill.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{6da0a5fd-a21a-4088-a586-c845619640b8}",
      "strict_min_version": "58.0"
    }
  },
  "developer": {
    "name": "Jeongseop Park 박정섭",
    "url": "https://www.parkjeongseop.com/?ref=authautofill"
  }
}