Examine source code of Prolific Assistant

{
  "manifest_version": 3,
  "name": "Prolific Assistant",
  "description": "Monitors https://prolific.com/ for new studies.",
  "version": "5.30.7",
  "icons": {
    "16": "/images/icon16.png",
    "19": "/images/icon19.png",
    "24": "/images/icon24.png",
    "32": "/images/icon32.png",
    "38": "/images/icon38.png",
    "48": "/images/icon48.png",
    "128": "/images/icon128.png"
  },
  "action": {
    "default_title": "Prolific Assistant",
    "default_icon": {
      "16": "/images/icon16.png",
      "24": "/images/icon24.png",
      "32": "/images/icon32.png"
    },
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{09993eda-1986-4e10-886e-5c63815338c5}"
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self';"
  },
  "permissions": [
    "notifications",
    "alarms",
    "storage",
    "identity",
    "offscreen"
  ],
  "host_permissions": [
    "https://*.prolific.co/*",
    "https://*.prolific.com/*"
  ],
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAhzWsR/8NvX86q0w2neyjLOdxF4H6tDG4Xf/Iu3pgE9JgpTbbLl9oTmRGisIruB19JMPijjXwOCKO4sGq/DeQj45jRlvQEZ1Q8nEK3jI6DpG3PqlxOIKL0cCH1FVl08gma/NumTvxCwNSoGz/rMLtgbX0y6T6ZKbGcfbSXDEe7VkmzqjldqffWfueNzD+E1E+ZTUY/b1zhhRC5Akx/+GZbOLHFCKMjESS1WVVciFsMMVRfRcmjv1i/4CtPvFUMCOJbLFY9HDuBMHBj+hqOGg5CVsPZ3apg49VGGYhr+opVWLti11P8y6uxAeHFoLemaZQovq79ZCxIqnt6SXbhzSZnQIDAQAB",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.prolific.co/*",
        "https://*.prolific.com/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}