Examine source code of Working - Tab & Subgroup Manager

{
  "manifest_version" : 3 ,
  "name" : "Working - Tab & Subgroup Manager",
  "version" : "2.4.0",
  "description" : "Organize tabs with nested subgroups, custom colors, quick copy-paste, and one-click session restore.",
  "author": "Working",
  "browser_specific_settings": {
    "gecko": {
      "id": "working-tab-subgroup-manager@extension.local",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions" : [
    "tabs" ,
    "storage" ,
    "contextMenus" 
  ],
  "action" : {
    "default_popup" : "popup.html",
    "default_title" : "Working",
    "default_icon" : {
      "16" : "icons/icon16.png",
      "48" : "icons/icon48.png",
      "128" : "icons/icon128.png"
    }
  },
  "sidebar_action": {
    "default_title" : "Working - Side Panel",
    "default_panel": "sidepanel.html",
    "default_icon" : "icons/icon48.png"
  },
  "options_page" : "dashboard.html" ,
  "icons" : {
    "16" : "icons/icon16.png",
    "48" : "icons/icon48.png",
    "128" : "icons/icon128.png"
  },
  "background" : {
    "scripts" : [
      "background.js" 
    ]
  },
  "commands" : {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+Shift+W",
        "mac": "Alt+Shift+W"
      },
      "description" : "Open Working Extension"
    }
  }
}