"The fifth public alpha build of Firefox 3 has been officially
released. The new alpha build, which is codenamed Gran Paradiso,
features early components of the revamped Places system, a cohesive
storage framework that will unify bookmark and history storage. An
earlier prototype of the Places system was tested in early Firefox
2 alpha (Bon Echo) builds but was removed because it couldn't be
completed within the Firefox 2 release timeframe.
"The current implementation of the Places system is still a work
in progress, but the final version will support features like
bookmark tagging, full-text indexing, extended metadata search,
built-in syncing functionality, and support for exporting bookmarks
in a broader number of formats..."