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A new version of Firefox just appeared. Bookmarks gone, homepage changed.

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I just brought up FF browser. It appears as if just installed. All bookmarks gone, Homepage changed, 'Welcome, new person', etc. How do I get all my old settings bacl?

''I just brought up FF browser. It appears as if just installed. All bookmarks gone, Homepage changed, 'Welcome, new person', etc. How do I get all my old settings bacl?

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Type about:profiles in the URL bar and hit Enter.

Do you have two Profiles?
If so, open the other one which isn't the Default Profile by suing the Launch profile in a new browser to see if your bookmarks and other user data is there.
And if that is the case, you can use the Set as default profile to go back to Firefox using that profile.

If you have more than two Profiles please provide a screenshot of that about:profiles internal page.
https://support.mozilla.org/en-US/kb/how-do-i-create-screenshot-my-problem