Examine source code of Tree Style Tab Lite

{
  "manifest_version": 2,
  "name": "Tree Style Tab Lite",
  "version": "1.0",
  "description": "Minimal Tree Style Tab-like sidebar for Firefox (MV2, AMO-safe, no icons). Groups tabs by opener and shows a simple collapsible tree.",
  "sidebar_action": {
    "default_title": "Tree Style Tab Lite",
    "default_panel": "sidebar.html"
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "tree-style-tab-lite@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}