Examine source code of TabGroups Pro

{
  "manifest_version": 2,
  "name": "TabGroups Pro",
  "version": "1.0",
  "description": "Organize tabs into groups for better productivity.",
  "icons": {
    "64": "icon64.png",
    "128": "icon128.png"
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "64": "icon64.png",
      "128": "icon128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5e9903cc-b510-4324-87bb-634b6762d95b}",
      "strict_min_version": "117.0"
    }
  }
}