Examine source code of JSON Table View

{
  "manifest_version": 3,
  "name": "JSON Table View",
  "version": "1.0",
  "description": "Displays JSON API output in a table format.",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "contentScript.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "mail@simon-kramer.org"
    }
  }
}