Web page translations are available in the latest beta builds of Mozilla Firefox. Google Chrome's built-in translation capabilities are something I find
Been using a extension for this which unfortunately has to use Google as a backend. Happy to see Mozilla doing this and I cannot wait to have this feature fully implemented
I have been using Linguist, which is an open source extension that works very well, you can translate a specific text selection or the whole text, and it even has an offline translator (using the Bergamot project).