DictHub is an open-source browser extension supporting translation & dictionary of 100+ languages.
Translation results are backed by various sources, and fully customizable with your preference by light-weight plugin system.
Popup (show translation right of browser):
# Click / alt + w
Overlay (show translation close to text selection)
# alt +
Compare translation result from different sources to improve accuracy.
Detailed explaination from dictionary sources is available for learning deeper.
Translation to both mother tongue as well as other languages.
Learn words better from different translations.