Familiar

Did you ever encounter a word that you didn't know its meaning but you did have that feeling that you had seen this word before?
Do you keep translating the same word again and again instead of remembering it?

This extension will help you follow those words that keep popping up in different places while surfing.
Choose the word you want to save, right-click it and choose 'Familiarize'. You'll get the definition of the word from the English Wiktionary and a list of the paragraphs with that word that you encountered ever before.
You can manage the list with the extension's button.
This extension is open source: https://github.com/kamomil/Familiar