To get Mozilla or Firebird working with the Win32 BookmarkSync client, close Mozilla (include the Quickstart program, if any) and the BookmarkSync client, then open your Windows registry editor (usually something like Start > Run > regexit). You'll want to add the following registry keys:
Hive: HKEY_CURRENT_USER Key: Software\Netscape\Netscape Navigator\Bookmark List Value Name: File Location Data Type: REG_SZ Value: fully qualified path and file name of mozilla bookmark file
Save your changes, then startup Mozilla and BookmarkSync.
ljsoares (originally to the bookmarksync mailing list).