There are several excellent bookmark-syncing extensions for Firefox, but Weave is the first major effort designed by Mozilla. The newest version of Weave is out of beta and supports more than just bookmark sync. It also supports syncing open tabs, history, passwords, preferences, and Firefox 3's advanced Location Bar data.
The add-on lives in your tools menu, in your Options menu, and in a Status Bar icon. From clicking on any of them, you can check your syncing log, create a user account and password, and toggle sync settings. The default is to sync all, but choosing the customization … Read more