You can't this isn't like Chrome that has on the fly language translator built in. If you want this option your sole choice is to go with Chrome to do this. Unless someone has created a Addon and keeps it up to date to work on the fly with FireFox. But I myself haven't found or seen anyone that presented that on here or Addon site to use.

Thanks Dropa for your explanation, yes I am also curious about it, how different language people translate it who's loving Mozilla. I shifted my all browsing with Mozilla, because I experienced it's much better than other browsers, and enjoying a lot with Mozilla, very fast browser if compare with Chrome.

There is a Google translate service. Remove the blank space in the link.

https://translate.google. com/

You can also search the Add-ons website for a suitable translate extension.

• https://addons.mozilla.org/en-US/firefox/search/?type=extension&q=translate

You can also search the Add-ons website for a suitable translate extension.

• https://addons.mozilla.org/en-US/firefox/search/?type=extension&q=translate

Thanks Cor-el for good recommendation, will use this Add-ons on my Mozilla browser, which I like for my all browsing.