Rated 4 out of 5 stars

Works great, but Add support for other countries, e.g. .com.ar,com.es.

It would be a good idea to show a message when Wolfram doesn't find any information.

This review is for a previous version of the add-on (0.2). 

Message when no results available.

Hi Diego. Thanks for the feedback. Other countries should work fine in Version 0.3.
I've added an icon and message that shows if Wolfram has a result/no result/result in development. In the second two cases the Wolfram page won't show unless you click the Wolfram button.
Hope this helps.