Hover a link and see the article's description in a balloon. Spoiler alert before you click. Enable it per site. Switch it on for a site, hover any link, and a balloon appears with the page's own description — plus a TL;DR built from the article text itself, so it still works on the many pages that publish no description or a one-line marketing blurb. No server, no API, no account, no analytics, nothing sent anywhere. Your cookies are never sent to the page being previewed.