FoxMarks is perfect for individuals who take their bookmarks everywhere. The extension lets users sync their bookmarks up to a web site and retrieve them at a later time and even from another PC with Internet access.
You have to register with FoxMarks, but its a small price to pay for something so helpful. I know I have some bookmarks at work that I would like to save for at home. This extension makes that process painless.
FoxMarks requires that you use Firefox 1.5.