this addon clears the competition, even native firefox translation isn't this convenient. it has text selection translation, full in-page translation and clean straight forward UI to control the language!
Great extension but for some reason now when I highlight text it makes a little icon pops up that lets me translate the text but I can't change it in the settings because the setting keeps going back and there isn't a save button to hit.
Open the extension's settings. Click on the "Translations" section. Change the "Show the button to translate the selected text" option from "yes" to "no". The setting is saved immediately.
