It simply has stopped working. It was a great addon, supposedly it has now been integrated into Firefox, but really I've tried everything and it's impossible to use this feature anymore.

With the release of firefox that have it integrated, we lost all page translations of beta languages.

On another note, i'd love to see this addon on Thunderbird too.

Maybe good, but not many languages :/

не перекладає нічого.

LATIN, please! Should be easiest of all languages... and never needs updating, except for general accuracy improvements. Then ELIZABETHAN ("Early Modern") ENGLISH, because a ton of that is in the public domain.

Too few languages.

Sorry to say it no longer works, it worked great at first. Then for some reason It no longer works. I have uninstalled it and re-installed it a couple of times, no joy. (Mac)

Works great so far.
It can optionally "Translate this tab automatically as you browse".
I also like that it is created "By Firefox" :)