The doorsopen extension for Chrome streamlines the process of assessing property affordability on Rightmove and Zoopla. This free add-on automatically calculates and color codes listings based on the user's financial inputs, including salary, deposit, interest rate, and repayment length. It caters to both for sale and rental listings, providing a clear visual representation of which properties fit within the user's budget.

Users can easily input their financial details, and the extension will display estimated monthly mortgage payments or rental affordability ratings. Listings are categorized as Affordable, Feasible, Longshot, or Unaffordable based on the calculated percentages of monthly income. Additionally, users can filter listings by affordability category, enhancing the search experience without compromising personal data, as the extension adheres to open-source principles.