To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!
CloseWelcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.
CloseReview for Link Status by canwehavenicethings
Rated 4 out of 5 stars
Nice in the case you're already concerned with link target url, the icon (and visit time) appears near it. Visited links can't be visually sorted out though.
To create your own collections, you must have a Mozilla Add-ons account.