Examine source code of Paste-a-Sauce

{
  "version": "1.0.0",
  "manifest_version": 3,
  "name": "Paste-a-Sauce",
  "description": "Chrome extension to fill out forms easier",
  "action": {
    "default_popup": "js/index.html",
    "default_title": "Paste-a-Sauce",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "gsmelkov@gmail.com"
    }
  }
}