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Restoring existing Firefox Bookmarks after IOS upgrade from W7 to W10

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I am upgrading my PC from W7 Home Premium to W10 soon. I understand this will result in a complete reimage of the PC and all existing files will have to be restored. I currently use a Seagate external hard drive as a system backup. Can the W7 "backup" Firefox file on the Seagate be used to restore my existing bookmarks to the new W10 Firefox download? If so, how do I do this?

I am upgrading my PC from W7 Home Premium to W10 soon. I understand this will result in a complete reimage of the PC and all existing files will have to be restored. I currently use a Seagate external hard drive as a system backup. Can the W7 "backup" Firefox file on the Seagate be used to restore my existing bookmarks to the new W10 Firefox download? If so, how do I do this?

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Hi there, Firefox data is stored in a hidden path, so first, please double-check that your backup actually contains those files. Otherwise, there will be nothing to restore.

Normal path on Windows:

C:\Users\<username>\AppData\Roaming\Mozilla\Firefox\

AppData is hidden, so make sure you've set Windows to show you hidden files and folders: https://support.microsoft.com/en-us/help/14201/windows-show-hidden-files

Can you find that in your backup? If not, you'll definitely need to make your own copy. This article has more info on profile backups:

Back up and restore information in Firefox profiles

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Sorry, I should mention that if you really only care about bookmarks, that's simpler. You can create a backup file or export file, and then use the restore or import feature in your new installation. I do recommend creating both a backup and export in case one of them doesn't work correctly:

Obviously send these to a safe place. You can attach them to an email to yourself as another backup.

Then later on Win10, try restoring the .json file first:

Restore bookmarks from backup or move them to another computer

Only if that doesn't work, try the .html file import:

Import Bookmarks from an HTML file