Examine source code of Easy Grade Calculator

{
  "manifest_version": 3,
  "name": "Easy Grade Calculator",
  "version": "1.0",
  "description": "Free Easy Grade Calculator to calculate your test, assignment and quize scores quickly.",
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/16.png",
      "48": "icons/48.png",
      "128": "icons/128.png"
    }
  },
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "mygradecalculator02@gmail.com"
    }
  }
}