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downloaded new version but it's put bookmarks etc in folder on desktop, how to reinstall ?

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I've installed the new version of firefox but there are no bookmarks transfered to this version, instead there's a folder appeared on the desktop called Old Firefox Data, how do i reinstall my bookmarks etc ?

I've installed the new version of firefox but there are no bookmarks transfered to this version, instead there's a folder appeared on the desktop called Old Firefox Data, how do i reinstall my bookmarks etc ?

Chosen solution

That happens when you reset (refresh) Firefox.

Isn't any data imported in the new profile?

When you reset Firefox then a new profile is created and some personal data (bookmarks, history, cookies, passwords, form data) is automatically imported and the current profile folder will be moved to the desktop to an "Old Firefox Data" folder. Installed extensions and other customizations (toolbars, prefs) that you have made are lost and need to be redone.

It is possible to recover data from the old profile, but be cautious not to copy corrupted files to avoid carrying over problems.

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Chosen Solution

That happens when you reset (refresh) Firefox.

Isn't any data imported in the new profile?

When you reset Firefox then a new profile is created and some personal data (bookmarks, history, cookies, passwords, form data) is automatically imported and the current profile folder will be moved to the desktop to an "Old Firefox Data" folder. Installed extensions and other customizations (toolbars, prefs) that you have made are lost and need to be redone.

It is possible to recover data from the old profile, but be cautious not to copy corrupted files to avoid carrying over problems.