A tab strip is a graphical user interface element, commonly found in web browsers, that displays all currently open tabs in a horizontal or vertical row. Each tab represents an individual webpage or document, allowing users to quickly switch between multiple open sites without opening new windows. The tab strip typically appears at the top or side of the browser window and includes controls for opening, closing, or rearranging tabs. In cybersecurity, monitoring the tab strip can help detect suspicious or unauthorized tabs that may indicate phishing attempts or malicious activity. Understanding tab strip behavior is essential for both user safety and browser security.