* https://support.mozilla.org/en-US/kb/how-do-i-set-sync-firefox-android

If you were NOT signed in

Hi, I’m sorry to hear about your phone — I’ll explain how Firefox Android backups work in a simple way 🙂 Can Firefox recover your data? It depends on whether you were signed in to a Mozilla (Firefox) account and had Sync enabled before you lost the phone. If you were signed in to Firefox You can recover synced data like: * Bookmarks * History * Passwords * Open tabs What to do: * Install Firefox for Android on your new phone * Sign in with the same Mozilla account * Turn on Sync Your data will automatically restore from Mozilla’s servers. * https://support.mozilla.org/en-US/kb/how-do-i-set-sync-firefox-android If you were NOT signed in Unfortunately: Firefox does not store backups online without Sync Data saved only on the lost phone cannot be recovered Local Android backups usually do not include Firefox browser data In this case, recovery is not possible. Important notes Mozilla cannot manually restore data Sync must be enabled before the phone is lost Signing in later does not recover past data I know this isn’t great news if Sync wasn’t enabled, but this is how Firefox protects user privacy. If you’re unsure whether you had a Firefox account, try signing in — your data may still be there