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InvisibleHand is a Firefox extension which can notify if the product you’re currently browsing available somewhere else at a cheaper price. It searches competing merchant sites for the same product and when available displays a discreet notification showing a better deal.

better deals

Apart from showing the best price among retailers, it also displays the percentage and actual money saved. The application currently supports more than 50 of US and UK retailers including Wal-Mart, Dixons, Amazon, Best Buy, Newegg, PC World etc.,


  • Firefox extension for real-time price comparison in your browser.
  • Find the cheapest offer for any product.
  • Displays the best price and actual money saved.
  • Currently supports over 50 US and UK retailers.

Check out InivisibleHand @

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  1. Michael Carmoney
    October 11, 2016 at 11:01 pm

    sounds good.

  2. AG
    August 17, 2009 at 3:37 am

    That sounds like a great add-on I am going to check it out, if it can givr good resultes and save money it will be a hit.

    I use SimilarWeb add-on to find similar sites, I found some sites that sold what I was looking for just cheaper. this add-on can replace it for that usage.