For syncing data like passwords, bookmarks in firefox browser across multiple computers, Foxmarks was a good tool (firefox add-on) but there is another good alternative that the firefox team is building, named Weave. Its going to help you sync all the firefox data in such a way that you can use the same in multiple desktops, laptops, phones etc. and extend your experience in firefox.

Every data including bookmarks, history, the address bar, the open tabs which you left as it is, can be continued browsing from another computer. Here are a few good features about Weave –

• Address bar is the same, so that a few keystrokes can lead you to your saved favorite addresses
• All the bookmarks same in every computer. Save it in any one, and every platform will save it
• In all, you can sync bookmarks, passwords, preferences, history and tabs
• Saved passwords help a lot in reducing your hand work in mobile phones to remember and type the passwords
• Weave Sync encrypts user data before uploading it to Mozilla’s servers, so that only you can access your data
• Filling the forms made easier if your form data is saved in one computer

The firefox add-on works with Firefox 3.5 and later versions! Its a good alternative for XMarks as it has more features and its a secured add-on to save and sync most of the firefox data! Download from here.