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After update, my firefox reverted to my old and unusable bookmarks leaving me with numerous lost bookmarks. How do I get them back?

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I recently updated my firefox and when I opened it, all of my bookmarks that I've made over the past several updates are gone. My current page shows bookmarks that I have deleted a long time ago or are no longer working. Even bookmarks that I have saved in folders are gone. My stumbleupon is also missing and will not update. As a teacher, many of my bookmarks were important and I would really appreciate some help.

I recently updated my firefox and when I opened it, all of my bookmarks that I've made over the past several updates are gone. My current page shows bookmarks that I have deleted a long time ago or are no longer working. Even bookmarks that I have saved in folders are gone. My stumbleupon is also missing and will not update. As a teacher, many of my bookmarks were important and I would really appreciate some help.

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I have tried opening my previous bookmarks and restoring them, but even the "recently bookmarked" section shows bookmarks that I made years ago instead of the ones that I made today.

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Figured it out! Nevermind.