Add setting/plugin to translate websites in stable Firefox. We are waiting for news as soon as possible, because Firefox is the only browser without Translation built into the browser.
You can use google translate or i thought there is a long way to use the firefox-translations add-on but that is more for testers or if you really want to use it but you can except bugs and you need to use nightly.
This is being worked on and is actually already available on Firefox for Android Nightly and Beta - check out @Andre_Natal's post in this thread for more info.
The Firefox-translations add-on is pretty good you can translate websites but also type text in text translation. But the only downside is that you don't have all the languages. Some are completed and some are in beta. It's more western languages then eastern languages. The most important for me is Japanese but is probably one of the difficulties. The difference between google translate and Firefox-translations is that the google version translation is maked by a bot but the firefox-translations is maked by humans. Everything by firefox-translations is translated by humans that's why it has not many languages because they need people who can speak, read, write that language. https://addons.mozilla.org/en-US/firefox/addon/firefox-translations/