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If your bookmarks, passwords, settings and other data is missing after updating Firefox, learn how to restore the data from another profile.

If Firefox starts up after an update without your bookmarks, passwords, saved tabs and other settings, check whether your data is available in a different [[Profiles - Where Firefox stores your bookmarks, passwords and other user data|profile]]. {for fx67}This can happen because Firefox creates a new [[Dedicated profiles per Firefox installation|dedicated profile for each Firefox installation]].{/for} To recover your Firefox data and settings from another profile: Type '''about:profiles''' into the Firefox address bar and press the {for win,linux}{key Enter}{/for}{for mac}{key Return}{/for} key. This will open the ''About Profiles'' page.<br>{for win}[[Image:Fx52aboutprofiles-Win]]{/for}{for mac}[[Image:about:profiles macOS]] {/for}{for linux}[[Image:Fx52_about-profiles-linux]]{/for}<br> This page should list at least one profile and could list many. The profile that Firefox is currently using will have this:<br> '''This is the profile in use and it cannot be deleted.''' {note}''Please do not delete any profiles. Don't use any Remove buttons.''{/note} If you have another profile listed on this page, it may contain your missing profile data. {for win}{for fx63}You can click the {button Launch profile in new browser} button to open another Firefox window using that profile. If the other profile doesn't contain your missing data, simply close that new window. If it does contain the missing data, you can set it as the profile that Firefox will open by default.{/for}{/for}{for mac, linux}You can click the {button Launch profile in new browser} button to open another Firefox window using that profile. If the other profile doesn't contain your missing user data, simply close that new window. If it does contain your missing data, you can set it as the profile that Firefox will open by default.{/for} Click the {button Set as default profile} button for that profile and Firefox will use it automatically the next time you open Firefox. For more information about managing Firefox profiles, see the [[Profile Manager - Create, remove, or switch Firefox profiles]] article.