Examine source code of Temp Mail

{
  "name": "Temp Mail",
  "version": "1.0",
  "description": "Make sure to keep your emails secure with Temp Mail! Get a free, disposable email address and protect your data from hackers. #TempMail #SecureYourData",
  "manifest_version": 2,
  "browser_action": {
    "default_popup": "index.html",
    "default_icon": "ph.png",
    "icons": {
      "16": "ph.png",
      "48": "ph.png",
      "128": "ph.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1e9bf6c7-ce1f-495a-a3f6-a94c71ebd5d5}"
    }
  }
}