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How can I get back bookmarks and all data saved from firefox account after reimaging the system

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I have firefox account with account and I've turned on the Sync. my OS(Win 10) got corrupted. My companies IT team has re-imaged the system(It formats and re installs all the softwares). They've installed the firefox 60 esr. I have signed in with my account and tried to restore the data. But I am not seeing/restoring the data. How to get all my bookmarks and other saved data back?

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Did you backup the data somewhere first? Did the reimaging save the old data?

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No. OS Corrupted suddenly. I was not having option to take backup. IT team has just formatted and re-imaged the system. So, It will not save in any firefox servers. even though creating account will save only local system. We will loose everything If OS corrupts or harddisk failures.... Right?

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Without backups . . . . . If you were using sync, some data might be salvaged.

  • A way to backup

Type about:support<enter> in the address bar.

Under the page logo on the left side, you will see Application Basics. Under this find Profile Folder. To its right press the button Show Folder.

Linux: Under the page logo on the left side, you will see Application Basics. Under this find Profile Directory. To its right press the button Open Directory.

Now Close Firefox. This is your current profile. Copy the folder As Is to a folder on a thumb drive.

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Mozilla Firefox :Portable Edition Mozilla Firefox, Portable Edition

A fully functional package of Firefox optimized for use on a USB key drive. A specialized launcher will allow most favorite extensions to work as you switch computers.

Firefox Portable is a 3rd-party build. Support is available here:

You can use sync to share data between profiles. But some data cannot be shared between different versions.

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Sorry, but Sync isn't intended to be used with a solitary device for the purpose of providing a backup in the case of an OS reinstall or re-imaging the hard drive.

The purpose of Sync is to synchronize Firefox data across multiple devices continuously; and not at user will by turning Sync on when they feel so inclined.