Ok, not really for foxes, but for Firefox. If you are using Firefox, like a lot of people are these days, you need to get Foxmarks. The description is this, “If you use Firefox on more than one computer, you’ll want Foxmarks. Install Foxmarks on each computer, and it will work silently in the background to keep your bookmarks synchronized. You can also log in to my.foxmarks.com to manage your bookmarks from any computer.”
Here is the other cool part though. By synchronizing your bookmarks to their website you are also backing them up. So, if you happen to have something go wrong like a computer crash or Firefox getting trashed (yes, I did that), then you can just synchronize back to your own computer. Viola! Everything good as new.
Also, since Foxmarks works with Firefox regardless of platform, I can synchronize my bookmarks between the two Macs I normally use at home and work and also the Windows laptop that I sometimes use. Very cleanly, and for free, makes sure that I always have my bookmarks when I need them.