Hi, should always still do this : *https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles *https://support.mozilla.org/en-US/kb/export-firefox-bookmarks-to-backup-or-transfer So not following it all but he would need to sign into his account and disable the information. Alternatively set up your own account with another email address. Not saying if this is coming from 2 profiles on another system or something else so a little confused still. This is all I have on Sync : *https://support.mozilla.org/en-US/kb/how-do-i-set-sync-my-computer *https://support.mozilla.org/en-US/products/firefox/sync *https://support.mozilla.org/en-US/kb/how-do-i-choose-what-types-information-sync-firefox *https://support.mozilla.org/en-US/kb/firefox-sync-troubleshooting-and-tips *https://support.mozilla.org/en-US/kb/change-primary-email-address-firefox-accounts

Sorry Wrong Information

Sorry, posted the wrong information. Use these links to create a new profile. Use this new profile '''as is. ''' Is the problem still there? http://kb.mozillazine.org/Profile_folder_-_Firefox#Navigating_to_the_profile_folder https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles https://support.mozilla.org/en-US/kb/how-run-firefox-when-profile-missing-inaccessible https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles Type '''about:profiles'''<enter> in the address bar.