Open Google Calendar with Toolbar Button is a free Firefox add-on designed to enhance user accessibility to Google Calendar. This simple yet effective tool allows users to open Google Calendar directly from the browser's toolbar, streamlining the process of managing schedules and events. The add-on provides a convenient button that redirects to the Google Calendar interface in a new tab, ensuring that users can quickly access their calendars without navigating through multiple steps.

This add-on falls under the category of web browsers, specifically tailored for Firefox users. Its lightweight nature and straightforward functionality make it an ideal choice for anyone looking to optimize their calendar management. By integrating this tool into the Firefox browser, users can enjoy a seamless experience, ensuring that they stay organized and on top of their schedules with minimal effort.