Examine source code of Prohiring Magic Button

{
  "manifest_version": 3,
  "name": "Prohiring Magic Button",
  "version": "0.0.92",
  "description": "Ultimate hiring tool for recruiters",
  "permissions": [
    "storage"
  ],
  "background": {
    "scripts": [
      "background.iife.js"
    ],
    "type": "module"
  },
  "action": {
    "default_popup": "popup/index.html",
    "default_icon": "icon-34.png"
  },
  "icons": {
    "128": "icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.linkedin.com/*",
        "https://*.prohiring.dev/*",
        "https://github.com/*"
      ],
      "js": [
        "content-ui/index.iife.js"
      ]
    },
    {
      "matches": [
        "https://www.linkedin.com/*",
        "https://*.prohiring.dev/*",
        "https://github.com/*"
      ],
      "css": [
        "content.css"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "*.js",
        "*.css",
        "*.svg",
        "icon-128.png",
        "icon-34.png"
      ],
      "matches": [
        "*://*/*"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "prohiringMagicButton@example.com",
      "strict_min_version": "130.0"
    },
    "gecko_android": {}
  }
}