Firefox cares so much that for over a year, this addon has not been updated but we should consider this over Chrome and Brave, which updates their language and translations daily. Too much missing. Sites translated yet not translated. Saved words don't sync and every time I log into new device, I am telling same old words which Mozilla Firefox highlights as red to remember them,and it doesn't recognize the words and names and doesn't have dictionaries of languages unlike Chrome or Edge. Unusable for work and typing and education. Sad.