Examine source code of Random Group Generator

{
  "manifest_version": 3,
  "name": "Random Group Generator",
  "version": "1.0",
  "description": "Divide a list into a specified number of groups.",
  "permissions": [
    "activeTab"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "images/icon16.png",
      "48": "images/icon48.png",
      "128": "images/icon128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{598a5d20-71ca-4fbc-a120-51bd43da0f79}"
    }
  }
}