TabSum is a free Chrome add-on developed by Leonard Hertel. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools. This handy tool provides users with the ability to visualize the sum of open tabs.

With TabSum, users can easily keep track of the total number of open tabs in their Chrome browser. The add-on displays this information in a clear and concise manner, allowing users to quickly assess the amount of tabs they have open at any given time.

TabSum is a valuable tool for those who tend to have multiple tabs open simultaneously and want to maintain a better understanding of their browsing habits. It provides a simple yet effective way to visualize the sum of open tabs, helping users stay organized and focused while browsing the web.

Overall, TabSum is a useful Chrome add-on that offers a straightforward solution for visualizing the sum of open tabs. It is an excellent tool for individuals who want to better manage their browsing experience and maintain a more organized workflow.