This is a great add-on. It gives you all the functionality that is built in to Chrome. Not only does add-on work on Firefox Android, it supports translation from Czech (something that translate built in firefox desktop does not support). For android, I like that it automatically pops asking if you want to translate instead of having to select something. Also, it translates the whole page instead of highlighting text to ask the add-on to translate. Excellent add-on.