Sync was intended to synchronize your personal information between devices/computers, not for permanent or temporary back-up of your personal information (bookmarks, passwords, etc.). You are safer creating a back-up of that information on a CD/DVD or a USB/pin/jump/thumb drive. You '''''should''''' backup your personal information regularly. '''''Read about Firefox Sync''''' --> https://support.mozilla.com/en-US/kb/what-firefox-sync *See --> http://support.mozilla.com/en-US/kb/Backing+up+your+information *See --> http://kb.mozillazine.org/Profile_backup *See --> http://kb.mozillazine.org/Profile_folder_-_Firefox *See --> http://support.mozilla.com/en-US/kb/Profiles *See --> http://support.mozilla.com/en-US/kb/Profiles#How_to_find_your_profile *See --> http://support.mozilla.com/en-US/kb/Recovering+important+data+from+an+old+profile *See --> http://kb.mozillazine.org/Show_hidden_files_and_folders '''If this reply solves your problem, please click "Solved It" next to this reply when <u>signed-in</u> to the forum.'''

No, there's something else wrong. The data is only erased on my Mac, not on my PC. This happened to me before and I thought it was just a bad hard drive, but I think it's Lion OS. Please fix this because I dislike safari. Thank you, Mike

'''mflynn''': Your question is different from the original question: the original poster was using Sync as a backup tool and not for its intended purpose. Please ask a new question and include all helpful details of your problem.