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Why doesn't Firefox remember my tabs from a previous session anymore??

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When Firefox has closed unexpectedly or after updating to latest version, etc? It doesn't even ask me to restore tabs from previous session anymore upon start-up. Under History, the restore previous session option isn't even highlighted??? What is going on??

When Firefox has closed unexpectedly or after updating to latest version, etc? It doesn't even ask me to restore tabs from previous session anymore upon start-up. Under History, the restore previous session option isn't even highlighted??? What is going on??

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Make sure that you do not run Firefox in permanent Private Browsing mode.

  • https://support.mozilla.com/kb/Private+Browsing
  • You enter Private Browsing mode if you select: Tools > Options > Privacy > History: Firefox will: "Never Remember History"
  • To see all History and Cookie settings, choose: Tools > Options > Privacy, choose the setting Firefox will: Use custom settings for history
  • Deselect: [ ] "Permanent Private Browsing mode"
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Nope! I checked and Permanent Private Browsing Mode was not selected. I have no clue what has happened, but it has been doing this now for a couple of weeks. It won't auto-fill anymore either??

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You can check if session restore is enabled.

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Yes, it is enabled!

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Is a file sessionstore.js created if you use this startup setting?

  • Tools > Options > General > Startup: "When Firefox Starts": "Show my windows and tabs from last time"