Symfony2 Profiler shortcut is a free Chrome extension developed by ztec. It falls under the category of Browsers and the subcategory of Add-ons & Tools. This extension provides access to the Symfony2 Profiler when a server response is made with the "X-Debug-Token". It is particularly useful for REST and AJAX development and testing.

With this extension, developers and testers can easily view relevant information on Symfony2 based applications. When the debug mode is enabled, a toolbar is displayed at the bottom, which leads to the Profiler when clicked. The Profiler allows easy access to logs and various information about the current request.

One of the key features of this extension is that it allows users to access the Profiler even if the debug toolbar is disabled or not shown. This is especially beneficial for REST applications where the debug toolbar only appears when rendering a web page. For JSON or XML rendering, accessing the Profiler can be a cumbersome process.

By looking at the Response headers, users can identify the "X-Debug-Token" key, which serves as the gateway to the debugger. This extension simplifies the process of opening the profiler for AJAX/XHR requests made on a website.

The latest update for Symfony2 Profiler shortcut includes the elimination of 404 errors with the profiler URL picker and improved UI performance.