Examine source code of Markdown Viewer

{
  "manifest_version": 2,
  "name": "Markdown Viewer",
  "version": "0.8.0",
  "description": "Render .md pages as readable HTML with TOC, metadata, tasks, and optional external images.",
  "author": "hvanmegen@gmail.com",
  "permissions": [
    "<all_urls>",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*/*.md*",
        "*://*/*.MD*"
      ],
      "js": [
        "markdown_renderer.js",
        "plain_view.js"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "browser_action": {
    "default_title": "Markdown Viewer",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "hvanmegen@gmail.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}