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all my data lost

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today when i open my pc my all my firefox data lost.. generated pass, history everything.. why this happen and how can i get them back?

today when i open my pc my all my firefox data lost.. generated pass, history everything.. why this happen and how can i get them back?

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If Firefox starts up without your bookmarks, passwords, saved tabs and other settings, check whether your data is available in a different profile. This can happen because Firefox creates a dedicated profile for each Firefox installation.

To recover your Firefox data and settings from another profile:

Type about:profiles into the Firefox address bar and press the Enter key. This will open the About Profiles page. This page should list at least one profile and could list many. The profile that Firefox is currently using will have this: This is the profile in use and it cannot be deleted.

If you have another profile listed on this page, it may contain your missing profile data. You can click the Launch profile in the 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. Click the Set as default profile button for that profile and Firefox will use it automatically the next time you open Firefox.

Hope this helps!

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