Hi, Thank you for contacting Mozilla Support. Firefox is pretty awesome that developers can develop almost anything with the openness of it. Firefox Sync is a built in sync to sync your Firefox profile across devices. For bookmarks there is Xmarks the extension, though be sure to turn on syncing for all or else you will get duplicates. superuser answer: [http://superuser.com/questions/233719/how-to-sync-bookmarks-across-google-chrome-and-mozilla-firefox-bookmarks] Firefox is pretty amazing, and let us know if this helps your issue.