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My bookmarks and history have disappeared, and I no longer have a FF profile which is supposed to be located in Library/Application Support. Any suggestions on how to resolve? I'm most concerned with recovering my bookmarks.

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I have tried restarting my computer, creating a new places database (there is no FF profile in Application Support so cannot create a new one), and restoring bookmark back-ups, none of which have resolved the problem.

I have tried restarting my computer, creating a new places database (there is no FF profile in Application Support so cannot create a new one), and restoring bookmark back-ups, none of which have resolved the problem.

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Problem solved! I got fed up dealing with Firefox without any history or bookmarks for 2 months and had lost hope of ever recovering my bookmarks. So I decided to uninstall Firefox and then re-install it so I could at least use Firefox properly and just start over with bookmarks. After re-installing and opening for the first time, all of my bookmarks were there!

To uninstall drag the Firefox icon from the Applications folder into the trash. I emptied the trash (not sure if necessary). I then downloaded the latest version of firefox from mozilla.com and followed the prompts to install. After opening for the first time, all of my bookmarks were there, as well as the history up to the time the issues began two months ago.