Date Leboncoin is a Chrome extension developed by arakmar that allows users to obtain the original publication date of an ad on Leboncoin. This handy tool is particularly useful for negotiating prices on long-standing online ads, especially for real estate or vehicle sales.

With Date Leboncoin, the original publication date is automatically displayed below the renewal date of the ad, as well as in the extension's pop-up window. This information provides valuable insights into how long an ad has been active, empowering users to negotiate better deals.

It's worth noting that if ads are recreated from scratch, the extension won't be able to display the original publication dates of the old ads. However, for existing ads, Date Leboncoin is a valuable tool for anyone looking to make informed purchasing decisions.