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How to delete my Firefox data from the Mozilla site

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When I moved my data from my old Windows 7 to my new Windows 11 computer, I used a Mozilla account to upload and save my bookmarks. I then transferred my data using a different method.

I would now like to delete my data from this (Mozilla) site but can't find it. Please show me how to clear all my bookmarks, passwords (!!!), everything from this site.

Thanks

When I moved my data from my old Windows 7 to my new Windows 11 computer, I used a Mozilla account to upload and save my bookmarks. I then transferred my data using a different method. I would now like to delete my data from this (Mozilla) site but can't find it. Please show me how to clear all my bookmarks, passwords (!!!), everything from this site. Thanks

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You can reset the password of the Mozilla Account to clear all data stored on the Sync server.