Examine source code of TempEmailify

{
  "manifest_version": 2,
  "name": "TempEmailify - An temporary extension mailbox",
  "homepage_url": "https://tempemailify.versoly.page/",
  "description": "A simple easy to use plugin for Disposable email is a service, that allows users to generate email address and receive emails.",
  "default_locale": "en",
  "version": "0.1.2",
  "permissions": [
    "storage",
    "unlimitedStorage"
  ],
  "icons": {
    "16": "icons/16.png",
    "19": "icons/19.png",
    "38": "icons/38.png",
    "48": "icons/48.png",
    "96": "icons/96.png",
    "128": "icons/128.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "TempEmailify - An temporary extension mailbox",
    "default_icon": {
      "16": "icons/16.png",
      "19": "icons/19.png",
      "38": "icons/38.png",
      "48": "icons/48.png",
      "96": "icons/96.png",
      "128": "icons/128.png"
    },
    "theme_icons": [
      {
        "light": "icons/16-light.png",
        "dark": "icons/16.png",
        "size": 16
      },
      {
        "light": "icons/19-light.png",
        "dark": "icons/19.png",
        "size": 19
      },
      {
        "light": "icons/38-light.png",
        "dark": "icons/38.png",
        "size": 38
      },
      {
        "light": "icons/48-light.png",
        "dark": "icons/48.png",
        "size": 48
      },
      {
        "light": "icons/96-light.png",
        "dark": "icons/96.png",
        "size": 96
      },
      {
        "light": "icons/128-light.png",
        "dark": "icons/128.png",
        "size": 128
      }
    ]
  },
  "Content-Security-Policy": "'unsafe-eval'",
  "author": "Karthikeyan Rajendran",
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'"
}