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Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Backup, recovery, and sync

Recover data

Learn how to recover your lost data.

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Back up and restore information in Firefox profiles

Restore your Firefox browsing data with a backup file

Restore bookmarks, passwords and data from an old Firefox profile

Recover user data missing after Firefox update

About your important data and their files

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