[nmstoker]

Also doesn't work on Firefox Nightly on Mobile.

However on the plus side, I'm not seeing a complete inability to translate in Nightly since the context menu let's me translate using Google Translate (i realise many won't want to send their text off to G but this does at least show up one of the claimed limitations in the article, that it simply wasn't possible at all)

[wenc]

Google Translate works offline if you download the language pair. If you block Google Translate from data then you have an offline translator.