Flashcard Mini by Oramr

Flashcard Mini is a productivity-enhancing Firefox extension that helps you learn new vocabulary while reading articles. Simply highlight any word on a webpage, and a pop-up will appear offering you the option to add it to your personal flashcards.
Once you've added words, the extension will display them in a simple, user-friendly interface every time you open a new tab. You can review the words, flip the flashcards to see their definitions, and mark them as "known" when you're confident you've learned them.
Whether you're expanding your vocabulary or just trying to remember a tricky word, Flashcard Mini turns your daily browsing into an effortless language learning experience!