the new york times has had something similar to this for years. you can highlight words and it will show a "question box" that you can click to see more inform

the new york times has had something similar to this for years. you can highlight words and it will show a "question box" that you can click to see more information about the word, google search, etc. it's displayed inline so you don't need to navigate away. it's a nice idea, but it's terribly annoying.