Rated 5 out of 5 stars

PLEASE can we have a version for Firefox 4 !!!!!!!

This is the best currency converter by far for pop-up conversion of a single value, generally all you want.

It perfectly complements ConvertMyCurrency, which automatically converts all recognized currency values on a page. However CMC fails to recognise that $ doesn't always mean greenbacks (eg I am writing from Australia, and often looking at New Zealand ar Canadian sites), or numbers without currency symbols! Forex does not have this problem due to its manual selection of currency conversion, which can be applied to any number on a page, regardless of whether a currency symbol is attached or not.

This review is for a previous version of the add-on (1.5.1-signed).