Rated 5 out of 5 stars

I've been using this great addon for years. Some weeks ago the data update from Yahoo stopped working. It's bad because Google Finance updates exchange rates only 4-5 times per day which is very poor compared to Yahoo's ~5-min update interval.

Edit: I've fixed the Yahoo bug. Anyone who is familiar to FF addons and programming can do this: search for dcurrency.js in the source code, and replace the two appearances of
var re = new RegExp("=x\">([0-9,.]*)</span></b></big>");
to
var re = new RegExp("=x\">([0-9,.]*)</span></span>");.
That's all.

This review is for a previous version of the add-on (0.4.1.1-signed.1-signed). 

Very good, Goose! It is exactly what I did (with some others little changes). New version(0.4.2) is now available.