Examine source code of TempMailer - Reusable temp email

{
  "icons": {
    "16": "icon16.plasmo.2577fc03.png",
    "32": "icon32.plasmo.d583dc1e.png",
    "48": "icon48.plasmo.e0fcfb1d.png",
    "64": "icon64.plasmo.e6259081.png",
    "128": "icon128.plasmo.96a1ede9.png"
  },
  "manifest_version": 3,
  "action": {
    "default_icon": {
      "16": "icon16.plasmo.2577fc03.png",
      "32": "icon32.plasmo.d583dc1e.png",
      "48": "icon48.plasmo.e0fcfb1d.png",
      "64": "icon64.plasmo.e6259081.png",
      "128": "icon128.plasmo.96a1ede9.png"
    },
    "default_popup": "popup.html"
  },
  "version": "0.1.1",
  "author": "TempMailer",
  "name": "TempMailer - Reusable temp email",
  "description": "Instant, reusable disposable email addresses. Paste into any signup form, see the verification message inline - no tab switching.",
  "homepage_url": "https://www.tempmailer.io",
  "permissions": [
    "storage",
    "clipboardWrite"
  ],
  "short_name": "TempMailer",
  "host_permissions": [
    "https://tempmailer-backend.onrender.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "extension@tempmailer.io",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "technicalAndInteraction",
          "authenticationInfo",
          "personallyIdentifyingInfo"
        ]
      }
    }
  }
}