Rated 3 out of 5 stars

Works as advertised. Auto-detects the original language. I like the fact that it translates the selected text in place by replacing it with its translation (although this loses all formatting of that text). The whole-page translate feature sends you to the google translate site just like a dozen other translation bookmarklets and add-ons do.

This review is for a previous version of the add-on (2.1.0.3).