Betrap de Makelaar is a Firefox extension aimed at enhancing the real estate browsing experience in the Netherlands. This subscription-based tool automatically detects properties that have been relisted, allowing users to streamline their property searches without needing to refresh listings constantly. By clicking the extension icon during a search, users can view a pop-up that reveals the price history of the selected property, showcasing essential information such as the original listing date, initial asking price, and historical WOZ value.

The extension utilizes official data sourced from trusted organizations like the Centraal Bureau voor de Statistiek (CBS), the Kadaster, and Funda.nl. Recent updates have focused on refining the user interface and optimizing network requests related to price histories, resulting in a more efficient user experience. Betrap de Makelaar stands out as a practical tool for anyone exploring the Dutch real estate market.