Examine source code of UnWeb - HTML to Markdown

{
  "manifest_version": 2,
  "name": "UnWeb - HTML to Markdown",
  "version": "1.0.0",
  "description": "Convert any webpage to clean Markdown using UnWeb. Un-webbing content, stripping web complexity.",
  "author": "UnWeb",
  "homepage_url": "https://unweb.info",
  "icons": {
    "16": "assets/icons/icon16.png",
    "48": "assets/icons/icon48.png",
    "96": "assets/icons/icon96.png",
    "128": "assets/icons/icon128.png"
  },
  "browser_action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "assets/icons/icon16.png",
      "48": "assets/icons/icon48.png",
      "96": "assets/icons/icon96.png",
      "128": "assets/icons/icon128.png"
    },
    "default_title": "UnWeb - Convert to Markdown"
  },
  "permissions": [
    "activeTab",
    "storage",
    "downloads",
    "https://api.unweb.info/*"
  ],
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "unweb@unweb.info",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "websiteContent"
        ],
        "optional": []
      }
    }
  },
  "content_security_policy": "script-src 'self'; object-src 'self'"
}