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How can I retrieve the history I lost - all of it is gone - when I d/l 46.0 for Mac?

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I got a notice popup that 46.0 had downloaded and was ready to install. I quit Firefox and restarted, but it froze for a couple of minutes. I forced quit and restarted. Then all my history was gone. I'm running Mac 10.8.5. I did not make any intentional adjustments to settings - just quit and restarted. Thanks!

I got a notice popup that 46.0 had downloaded and was ready to install. I quit Firefox and restarted, but it froze for a couple of minutes. I forced quit and restarted. Then all my history was gone. I'm running Mac 10.8.5. I did not make any intentional adjustments to settings - just quit and restarted. Thanks!

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There might have been a problem with the places.sqlite database that stores bookmarks and history.

If you use the Time Machine then you can try to restore the places.sqlite file from that backup.

You can use this button to go to the current Firefox profile folder: