Examine source code of HTML to Markdown

{
  "manifest_version": 2,
  "name": "HTML to Markdown",
  "description": "Convert webpage HTML to Markdown and download",
  "version": "1.3.0",
  "icons": {
    "16": "icon/16.png",
    "48": "icon/48.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "downloads",
    "contextMenus",
    "scripting",
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "html2md@serdiuk.dev",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": []
}