Rated 3 out of 5 stars

It does the job but it is lacking in choices of translation sources. Ex: When translating for Indonesian to English the only choice it gives you is Microsoft which is kind of poor at that language and it does not offer google translate even though it is availible in that language.

It also requires the translations to happen on a seprate window instead of on the page your on unlike other translation apps out there.

This review is for a previous version of the add-on (4.19.1-signed). 

Choices of translation sources

We have used free Google translation service to provide translations for most languages until Google discontinued the free access to its translation service for developers like us, and launched a paid usage for developers.
We do our best to keep our service free for our users.
Because, we don't have enough resources to provide free translation for all Google languages, we now use Google only for the languages not supported by other translation providers, such as Microsoft Translator, Babylon and PROMT. The Google-only supported languages are Afrikaans, Albanian, Belarusian, Croatian and some others.
We apologize for this inconvenience and hope you will understand our position.