gtranslate is a Firefox addon that translates the selected text using Google Translate.
You can install it from the Mozilla Addons website: https://addons.mozilla.org/fr/firefox/addon/918/
Mozilla Public License 2.0
Original Author: Pau Tomàs
Maintainer: Pierre Bertet bonjour@pierrebertet.net
Contributors: https://github.com/bpierre/gtranslate/graphs/contributors