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When I open Firefox past tabs that have been closed appear again.

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When I open Firefox past tabs that have been closed appear again.

When I open Firefox past tabs that have been closed appear again.

Additional System Details

Installed Plug-ins

  • Version 5.41.3.0
  • Shockwave Flash 26.0 r0

Application

  • Firefox 46.0.1
  • User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:46.0) Gecko/20100101 Firefox/46.0
  • Support URL: https://support.mozilla.org/1/firefox/46.0.1/Darwin/en-US/

Extensions

  • DuckDuckGo Plus 1.1.4 (jid1-ZAdIEUB7XOzOJw@jetpack)
  • Firefox Hello 3.0.0 (loop@mozilla.org)
  • Multi-process staged rollout 1.0 (e10srollout@mozilla.org)
  • Pocket 1.0 (firefox@getpocket.com)
  • Stylish 2.0.7 ({46551EC9-40F0-4e47-8E18-8E5CF550CFB8})
  • Youtube Unblocker Remediation 1.2 (malware-remediation@mozilla.org)

Javascript

  • incrementalGCEnabled: True

Graphics

  • adapterDescription:
  • adapterDeviceID: 0x0d22
  • adapterDrivers:
  • adapterRAM:
  • adapterVendorID: 0x8086
  • driverDate:
  • driverVersion:
  • info: {u'AzureCanvasBackend': u'skia', u'AzureFallbackCanvasBackend': u'none', u'AzureContentBackend': u'quartz', u'AzureSkiaAccelerated': 1}
  • numAcceleratedWindows: 1
  • numTotalWindows: 1
  • supportsHardwareH264: No;
  • webglRenderer: Intel Inc. -- Intel Iris Pro OpenGL Engine
  • windowLayerManagerRemote: True
  • windowLayerManagerType: OpenGL

Modified Preferences

Misc

  • User JS: No
  • Accessibility: No
FredMcD
  • Top 10 Contributor
4225 solutions 58977 answers

You may have corrupt sessionstore file(s). Delete all sessionstore* files and the sessionstore-backups folder.

Type about:support<enter> in the address bar.

Under the page logo on the left side, you will see Application Basics. Under this find Profile Folder. To its right press the button Show Folder. This will open your file browser to the current Firefox profile. Now Close Firefox.

Locate the above file. Then rename or delete it. Restart Firefox.

You may have corrupt '''sessionstore''' file(s). Delete all '''sessionstore*''' files and the '''sessionstore-backups''' folder. Type '''about:support'''<enter> in the address bar. Under the page logo on the left side, you will see '''Application Basics. ''' Under this find '''Profile Folder. ''' To its right press the button '''Show Folder. ''' This will open your file browser to the current Firefox profile. Now '''Close Firefox. ''' Locate the above file. Then rename or delete it. Restart Firefox.
cor-el
  • Top 10 Contributor
  • Moderator
17416 solutions 157366 answers

The System Details list next to the question shows that you run an older Firefox 46 version that is no longer supported with security updates.

  • Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:46.0) Gecko/20100101 Firefox/46.0

Always update Firefox and Add-ons to the latest versions to get all security fixes.

Please update to the current Firefox 54.0.1 release.

The System Details list next to the question shows that you run an older Firefox 46 version that is no longer supported with security updates. *Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:46.0) Gecko/20100101 Firefox/46.0 Always update Firefox and Add-ons to the latest versions to get all security fixes. Please update to the current Firefox 54.0.1 release. *https://support.mozilla.org/en-US/kb/update-firefox-latest-version *https://support.mozilla.org/en-US/kb/Installing+Firefox+on+Mac
jscher2000
  • Top 10 Contributor
8637 solutions 70654 answers

As a footnote, if your Firefox is not shutting down normally -- if Firefox perceives that it crashed -- then it will automatically try to restore your previous session.

If you are not using Firefox > Quit (or is it File > Quit) to shut down Firefox when you're done browsing and about to shut down your Mac, please try that for a while and see whether it makes a difference.

As a footnote, if your Firefox is not shutting down normally -- if Firefox perceives that it crashed -- then it will automatically try to restore your previous session. If you are not using Firefox > Quit (or is it File > Quit) to shut down Firefox when you're done browsing and about to shut down your Mac, please try that for a while and see whether it makes a difference.