Examine source code of Bookmarks export

{
  "manifest_version": 3,
  "name": "Export Bookmarks",
  "description": "Export all your bookmarks to CSV or Excel format",
  "version": "1.1.0",
  "author": "Patrice J. - pjdev92@gmail.com",
  "browser_specific_settings": {
    "gecko": {
      "id": "4eed475d3dB3894e9dzadD9061DF3f2765DE0b23pjdev92@gmail.com"
    }
  },
  "permissions": [
    "activeTab",
    "bookmarks",
    "downloads"
  ],
  "action": {
    "default_icon": {
      "16": "images/mark-16.png",
      "32": "images/mark-32.png",
      "128": "images/mark-128.png"
    },
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "images/mark-16.png",
    "32": "images/mark-32.png",
    "128": "images/mark-128.png"
  },
  "content_scripts": [
    {
      "js": [
        "content.js",
        "xlsx.full.min.js",
        "xlsx.zahl.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ]
    }
  ]
}