Examine source code of Customizable Keyboard Shortcuts

{
  "manifest_version": 2,
  "name": "Customizable Keyboard Shortcuts",
  "version": "1.0",
  "description": "Allows you to create custom keyboard shortcuts for common actions in Firefox.",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y"
      },
      "description": "Execute the default action"
    },
    "open_new_tab": {
      "suggested_key": {
        "default": "Ctrl+Shift+T"
      },
      "description": "Open a new tab"
    },
    "close_current_tab": {
      "suggested_key": {
        "default": "Ctrl+Shift+W"
      },
      "description": "Close the current tab"
    },
    "refresh_page": {
      "suggested_key": {
        "default": "Ctrl+Shift+R"
      },
      "description": "Refresh the current page"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6fa4214b-d279-41e0-a04c-dcf6300e4b2c}"
    }
  }
}