Examine source code of CopyAll

{
  "manifest_version": 3,
  "name": "CopyAll",
  "version": "1.1.1",
  "description": "Copy all text, without any restrictions",
  "developer": {
    "name": "NotAloneBoy",
    "url": "https://github.com/NotAloneBoy"
  },
  "icons": {
    "32": "icons/32.png",
    "48": "icons/48.png",
    "64": "icons/64.png",
    "128": "icons/128.png",
    "1280": "icons/1280.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "copyall@notaloneboy"
    }
  },
  "permissions": [
    "activeTab",
    "webNavigation"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "host_permissions": [
    "<all_urls>"
  ]
}