Can you clarify what you mean with "how do I obtain a recovery key"? If you install Sync then a recovery key is generated automatically.<br /> You can pair other devices if Sync is already set up on one of them. *Android OS > Settings > Accounts > Firefox Sync > Pair a new Device ---- *https://support.mozilla.org/kb/how-do-i-set-up-firefox-sync *https://support.mozilla.org/kb/add-a-device-to-firefox-sync *https://support.mozilla.org/kb/ive-lost-my-firefox-sync-account-information *https://support.mozilla.org/kb/how-do-i-manage-my-firefox-sync-account *https://support.mozilla.org/kb/firefox-sync-troubleshooting-and-tips