Rated 5 out of 5 stars
It is great and it works perfectly even with Firefox 3.5. Mr. Didier Lafleur takes care of this extension and now even made graphs.
Allow me to ask him a question - would it be possible to extend this great add-on so that I can see stocks too - with =/- percentage values? There is not so much around working with later Firefox releases and I am confident that he could do it in a perfect way - what he did with currencies.