Web sites must specifically enable their sites for microsummaries, the functionality behind Live Titles, for you to gain this benefit in your bookmarks. You, also, must save your bookmarks in a specific way to enable Live Titles. At the time of Firefox 2.0's launch, a small sample of Live Title-enabled sites were known to be available. For more information, see Mozilla's .
It's fairly easy to add Live-Titles-enabled sites to your bookmarks so that they will display Live Titles. Essentially, you opt to save such a bookmark as a Live Title with a drop-down from the Add Bookmark page. For step-by-step instructions with pictures, see Mozilla's .
It's also possible for Firefox add-on developers to create Microsummary generators for sites managed by others. You can install some of those available from this Microsummary Generators link page, and then add the bookmark as a Live Title, as described previously. Note: Most of these generator pages work only on specific pages of the sites they work with, including the generators for eBay, FedEx, and UPS. In some cases, these are pages you must customize, or that only apply when you're watching a specific eBay item or checking on the delivery of package with a tracking number.
Firefox 2.0 does not offer a user interface for uninstalling microsummary generators. In Windows, you'll find them in the "microsummary-generators" folder located in your Firefox profile folder. To remove a specific microsummary generator, delete its XML file from this folder.
Live Titles is a nice idea that isn't likely to catch on in broad measure. Even so, for certain sites, it could be truly useful. The biggest problem with Live Titles is that most of the sites that have enabled it haven't opted to include the names of their sites in the Live Title. That's a problem, because for the most part, all you get is the description -- and it can quickly become difficult to know what site the description refers to. If you're truly organized about how you use bookmarks, though, you might figure out a way to make this work for you. Live Titles is especially well suited to blogs and the custom tools you'll find among the early crop of generators.