Tab Count in Window Title is a Firefox extension designed to enhance the visibility of tab counts within each browser window title. This tool allows users to see how many tabs are open at a glance by adding a customizable prefix to the window title. While the extension works seamlessly on most pages, it may not display the tab count on certain pages like the new tab page due to API limitations. Additionally, users can personalize the appearance of the tab count through CSS customization options, making it a versatile tool for personalized browsing experiences.

The extension also features a toolbar button that opens a popup, enabling users to assign names to their windows. These names can be displayed in the window titles, providing better organization and easier navigation between multiple windows. The extension requires permissions to save window-specific data, such as window names, but this permission is optional in the latest version. Overall, Tab Count in Window Title offers practical enhancements for Firefox users looking to improve their browsing efficiency.