I suspect that the issue is that the language code in the chrome.manifest for the language pack is incorrect (if it is pt_BR, then it needs to be pt-BR). The same issue also affects all of the english language pack variants too.
I suspect that the issue is that the language code in the chrome.manifest for the language pack is incorrect (if it is pt_BR, then it needs to be pt-BR). The same issue also affects all of the english language pack variants too.