Firefox डाउनलोड करें प्रणालियाँ और भाषाएँ नया क्या है गोपनीयता Backup, recovery, and sync Sync your data across different platforms and devices, backup what’s important, and recover it if it’s lost. सभी All articles and threads Backup data Recover data Sync data अंग्रेजी में Reset your Mozilla account password with Recovery Keys Recover important data from an old profile I've lost my Firefox Sync account information - What to do