What devices are connected to Sync ? Do you Sync the logins to a iOS device ?

Our developers have finished their investigation and an update for Firefox for iOS has been published. This is version number 121.1 and we strongly recommend that you update to this as soon as possible. If you experienced data loss with the previous update we apologise for the inconvenience this may have caused. You may be able to recover your logins through one of two ways: # Use an existing backup of your Firefox profile that you may have taken (see this [https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles#w_restoring-a-profile-backup support article]) or, # Take a backup of your Firefox profile (this [https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles#w_backing-up-your-profile article] will help). Keeping Firefox closed, find the file named logins-backup.json. Take a copy of it, rename it to logins.json replacing the existing file with the same name. We apologise that this has happened. Work is being done internally to reduce the chances of this happening again but we appreciate that this does not make up for the disruption this has caused you.