Price comparison is one of the essentials things that Internet users should do before buying a product on the Internet or locally
It does not matter if they do compare prices manually by visiting several Internet shops that carry the product or use a price comparison service instead which simplifies the process.
The main reason for comparing prices is that they can differ a lot between shopping sites which means that you may save a lot of money when you buy a product at the right store.
The Invisible Hand add-on for Firefox is an unobtrusive add-on that notifies users if it detected an Internet store in its database that sells a product for less than the current shop.
It displays a row beneath the tabs in Firefox whenever it finds a shop with a lower price. The system only works if you are visiting one of the 50+ supported Internet shops in the United Kingdom or United States.
The bar with the better price won't appear if there is no better price or if the shop is currently not supported by the Firefox add-on.
There are currently a few problems associated with the add-on that I would like to outline below:
The service is currently in beta and the developers have already mentioned that they are working on several of the problems listed in this article.
Invisible Hand is nevertheless an interesting alternative for Firefox users from the UK and US who do a lot of online shopping. Interested users can take a look at the developer website to see the list of supported retailers or download the add-on from the Mozilla Firefox website.
Update: It seems that Germany has been added recently to the add-on. The total number of supported retailers has crossed the 580 mark.
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Ghacks is a technology news blog that was founded in 2005 by Martin Brinkmann. It has since then become one of the most popular tech news sites on the Internet with five authors and regular contributions from freelance writers.