DOM Update Highlighter is a free Chrome add-on developed by klntsky. This WebExtension is designed to assist frontend developers in identifying and observing inefficiencies in working with the Document Object Model (DOM) of a webpage. By highlighting DOM updates as they occur, developers can easily identify excessive content updates or tree rebuilds.

With DOM Update Highlighter, frontend developers can gain valuable insights into how dynamic web content is being updated. This tool proves especially useful for identifying performance bottlenecks and optimizing the efficiency of a webpage. By visually highlighting DOM updates, developers can easily spot areas that require attention and make the necessary adjustments to improve performance.