Examine source code of Polycred: Free Email Alias Generator & Manager

{
  "manifest_version": 2,
  "name": "Polycred: Email Alias Generator & Manager",
  "version": "1.3.1",
  "description": "Easily generate unique email aliases for website signups to take control of your email privacy & security. Use your existing inbox.",
  "icons": {
    "16": "icons/polycred16.png",
    "24": "icons/polycred24.png",
    "32": "icons/polycred32.png",
    "48": "icons/polycred48.png",
    "96": "icons/polycred96.png",
    "128": "icons/polycred128.png"
  },
  "background": {
    "page": "background/page.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "run_at": "document_end",
      "js": [
        "js/vendor/browser-polyfill.min.js",
        "js/errors.js",
        "js/content_comms.js",
        "content/index.js"
      ],
      "all_frames": true
    }
  ],
  "web_accessible_resources": [
    "iframe/initial.html",
    "iframe/generate.html",
    "iframe/filter.html",
    "icons/polycred.svg",
    "icons/polycred16.png",
    "icons/polycred24.png",
    "icons/polycred32.png",
    "icons/polycred48.png",
    "icons/polycred96.png",
    "icons/polycred128.png"
  ],
  "browser_action": {
    "browser_style": true,
    "default_icon": {
      "16": "icons/polycred16.png",
      "24": "icons/polycred24.png",
      "32": "icons/polycred32.png",
      "48": "icons/polycred48.png",
      "96": "icons/polycred96.png",
      "128": "icons/polycred128.png"
    },
    "default_title": "Polycred: Email Alias Generator & Manager",
    "default_popup": "popup/index.html"
  },
  "permissions": [
    "http://*/*",
    "https://*/*",
    "tabs",
    "storage",
    "clipboardWrite"
  ]
}