For the record, [this December 30, 2025 revision](https://support.mozilla.org/en-US/kb/firefox-backup/revision/317178) removed the note that included the text, *This feature is being introduced to the Firefox user base through a progressive rollout. Currently, creating backups may only be available for users on Windows 10, and restoring from backups may only be available for users on Windows 10 and Windows 11.* A new revision is pending review that adds back a note about feature availability. See https://support.mozilla.org/en-US/kb/firefox-backup/history
Bug 1975254 Comment 12 Edit History
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For the record, [this December 30, 2025 revision](https://support.mozilla.org/en-US/kb/firefox-backup/revision/317178) removed the note that included the text, *This feature is being introduced to the Firefox user base through a progressive rollout. Currently, creating backups may only be available for users on Windows 10, and restoring from backups may only be available for users on Windows 10 and Windows 11.* A new revision is pending review that adds back a note about feature availability. See https://support.mozilla.org/en-US/kb/firefox-backup/history Flavius, can you review the pending revision? In case it helps, I found bug 1990634 and bug 1995651 on profile issues that disable backup.