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. 

When you name your add-on for Firefox Incredible Bookmarks, you know you are setting the bar pretty high, right from the introduction.  Pitched to users as the greatest add-on suite for bookmark lovers, Incredible Bookmarks for Firefox does impress.
The features to love here are plentiful. You can dynamically, show bookmarks by using folder and search terms.  Highlight the bookmarks in any color you would like, sort the bookmarks by name, visit time, last visited and most visited, and a [...]

How often do you still use bookmarks? 
Generally speaking, I find there are two types of browsing people.  You have those who still bookmark everything they find interesting, and then those who only bookmark what they need, and Google everything else.  A lot of the time, typing something into the search box might be a faster way to launch a web page, rather than searching through a bucket-full of saved links.
Take a stand, and leave you thoughts in [...]

Have more than a few bookmarks you want to keep handy on the bookmarks toolbar in Firefox but don’t have the room?  Multirow Bookmarks Toolbar, an extension for Firefox, will help you solve that issue by letting you add as many bookmark toolbars as you need.

Once installed, the options here are simple.  You can enable or disable the multiple bookmark rows, and you can also set the max number rows to display.  If it doesn’t exactly match up with [...]

Want to have the power of your bookmark collection right at your fingertips?  SiteLauncher will allow you to assign keyboard shortcuts to all your favorite bookmarks.

To launch, all you have to do is hit Ctrl+Space (or for the Mac users Ctrl+Alt).  If you want to use it without the graphical launcher above, use Shift+Alt (or Shift+Ctrl for the Mac users).
Some of the best features include the ability to customize the appearance, set the launcher to open in current or new [...]

Here is a tip I randomly ran across via Smart Productivity.  Want to quickly copy and paste a text-based list of your bookmarks?  All you need to do is right-click a folder icon in your bookmarks and select Copy.  After doing so, you can right-click and select Paste to paste the list anywhere you need it.  It will be saved to your clipboard, organized by folder names.
Here is one more tip from the Smart Productivity blog:
One other great use [...]

Backing up your bookmarks is one of those chores you have on your to-do list but never get around to it.  Then when they are lost, you say – I wish I would have.  Here are a few Firefox bookmark backup techniques to help you out.
How to Backup Your Bookmarks Manually
From the Firefox menu bar go to Bookmarks >  Organize Bookmarks to bring up your bookmarks manager.  Now you want to click the top button that says Import and Backup.
[...]

To tell you the truth, I have not used the Unsorted Bookmarks feature in Firefox 3 that much at all.  Why?  Well, it is a ‘bit of a pain to get to.  You have to open your bookmark manager, open up all bookmarks in the tree then go down to unsorted bookmarks.  Want an easier way to access your unsorted bookmarks?
Right-click on your bookmarks toolbar, and select “New Bookmark”.

The name can be anything.  To keep things simple, for now [...]

As another Extend Firefox 3 contest winner, HandyTag deserves a look.  This add-on for Firefox provides a complete set of the most relevant keywords when you bookmark a page.  Where do these keywords come from?  Many different sources from around the Web.
This comes in handy when you bookmark a page, and your not sure exactly with what words it should be tagged with (or you don’t want to take the time to think it out).  There is no need [...]

Want to make tagging your bookmarks as easy as clicking an icon?  Tagmarks, the add-on for Firefox, hopes to do just that.  The idea here is to bring one-click bookmarking in Firefox together with the tagging power of the browser.
With Tagmarks, you have a lot of different icons that popup whenever you hover over the traditional bookmarking star you see in the Firefox 3 address bar.  When you click in each icon, it will add the page to the [...]