File this add-on under awesome. The Places’ Tooltip add-on for Firefox adds more detailed information about the bookmarks and links you have saved to your browser.
It shows you more than your standard name and address, as Firefox does by default. Once installed, you can see:
the last visited date, the tags associated with the link, the description and the keywords
It shows the tooltip for and in:
all links, folders, bookmarks, RSS items in the bookmarks toolbar, bookmarks menu, history menu and sidebars
This is a great simple extension for those who just need to have a little more information handy about the links they have saved to the browser. You can pick up the Places’ Tooltip add-on on the Firefox Add-ons web site.