Examine source code of Notion Boost

{
  "name": "Notion Boost",
  "short_name": "Notion Boost",
  "version": "3.3.1",
  "description": "Boost Notion productivity with 20+ customizations like outline,small text full width for all,back to top button etc",
  "author": "Gourav Goyal",
  "content_scripts": [
    {
      "matches": [
        "*://*.notion.so/*",
        "*://*.notion.site/*"
      ],
      "js": [
        "content.bundle.js"
      ]
    },
    {
      "matches": [
        "https://extensionpay.com/*"
      ],
      "run_at": "document_start",
      "js": [
        "extPay.bundle.js"
      ]
    }
  ],
  "page_action": {
    "default_title": "Notion Boost",
    "default_popup": "popup.html",
    "default_icon": {
      "19": "images/icon19.png",
      "38": "images/icon38.png"
    },
    "show_matches": [
      "*://*.notion.so/*",
      "*://*.notion.site/*"
    ]
  },
  "web_accessible_resources": [
    "content.bundle.js"
  ],
  "manifest_version": 2,
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'; connect-src https://extensionpay.com",
  "homepage_url": "https://gourav.io/notion-boost",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "icons": {
    "48": "images/icon48.png",
    "96": "images/icon96.png"
  },
  "developer": {
    "name": "Gourav Goyal",
    "url": "https://gourav.io"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0d49b33c-467a-4897-bea4-c82d6756e5c4}"
    }
  }
}