Xmarks is a free add-on for your browser that synchronizes and backs up your favorites across multiple computers and more. Xmarks helps you find the best sites on the web based on what millions of people are bookmarking.
It can automatically backup and sync your favorites after every change.
It can also learn more about top sites when you search on Google.
You will be able to visit my.xmarks.com to access your favorites online.
The only one disadvantage is that Xmarks 1.1 is a beta version, but you can try using its features. Just download it easily from the developer's web site.