Are there any extensions for browsers where I can add words and build vocabulary to learn added words later?
I currently use Google Translate extension for Chrome, which is very useful. If I read an article and don't know the word, then I just double click on the word and I see translation, but I would like to learn them later also to not forget.
I imagine something like that, if I select the word and right click on it, then there will be option "add to vocabulary" for example. It would be even better if there will be possibility to take a test later with the added words.