This is a great solution to unobtrusively learn vocabulary while reading the things we're interested in. As others pointed it's weakness is clearly in how it handles sentence structure, but it seems reasonable to accept that it's just going to do one thing really well.

There's only one problem I see with learning vocabulary this way, you need a way to store what you've learned. I thought of one solution, you could drag and drop words into a box linked to your Quizlet (or a similar service) account.

Great Extension. Thanks!