Examine source code of Copy Page as Markdown

{
  "manifest_version": 3,
  "name": "Copy Page as Markdown",
  "version": "1.0.0",
  "description": "Copy web pages as lean markdown for AI consumption - works on ANY website!",
  "browser_specific_settings": {
    "gecko": {
      "id": "copy-page-as-markdown@example.com",
      "strict_min_version": "109.0"
    }
  },
  "permissions": [
    "activeTab",
    "clipboardWrite"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-script.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Copy Page as Markdown"
  }
}