Firefox will not open with previous session. Option automatically resets to default.

I set options to: "Show my windows and tabs from last time". But, when I start Firefox, it does not save this option and reverts to the default option. I've tired disabling add-ons and refreshing Firefox, but the problem still occurs.
Troubleshoot report:
Application Basics
Name: Firefox
Version: 36.0
User Agent: Mozilla/5.0 (Windows NT 6.0; rv:36.0) Gecko/20100101 Firefox/36.0
Multiprocess Windows: 0/1
Crash Reports for the Last 3 Days
Report ID: bp-fb4e0890-4a04-4323-ab6d-9b0ef2150304
Submitted: 19 hours ago
All Crash Reports
Extensions
Name: Google Translator for Firefox
Version: 2.1.0.3m
Enabled: true
ID: [email protected]
Name: Norton Toolbar
Version: 2014.7.10.26
Enabled: true
ID: {2D3F3651-74B9-4795-BDEC-6DA2F431CB62}
Name: Microsoft .NET Framework Assistant
Version: 0.0.0
Enabled: false
ID: {20a82645-c095-46ed-80e3-08825760534b}
Graphics
Adapter Description: NVIDIA GeForce GTX 260
Adapter Drivers: nvd3dum nvwgf2um,nvwgf2um
Adapter RAM: 896
Device ID: 0x05e2
Direct2D Enabled: true
DirectWrite Enabled: true (7.0.6002.23200)
Driver Date: 7-2-2014
Driver Version: 9.18.13.4052
GPU #2 Active: false
GPU Accelerated Windows: 1/1 Direct3D 11 (OMTC)
Subsys ID: 12603842
Vendor ID: 0x10de
WebGL Renderer: Google Inc. -- ANGLE (NVIDIA GeForce GTX 260 Direct3D9Ex vs_3_0 ps_3_0)
windowLayerManagerRemote: true
AzureCanvasBackend: direct2d
AzureContentBackend: direct2d
AzureFallbackCanvasBackend: cairo
AzureSkiaAccelerated: 0
Important Modified Preferences
browser.cache.disk.capacity: 358400
browser.cache.disk.smart_size.first_run: false
browser.cache.frecency_experiment: 4
browser.places.smartBookmarksVersion: 7
browser.sessionstore.upgradeBackup.latestBuildID: 20150222232811
browser.startup.homepage: http://my.myway.com/index.jsp?speedbarconfigchanged
browser.startup.homepage_override.buildID: 20150222232811
browser.startup.homepage_override.mstone: 36.0
extensions.lastAppVersion: 36.0
gfx.direct3d.last_used_feature_level_idx: 1
media.gmp-gmpopenh264.lastUpdate: 1425537886
media.gmp-gmpopenh264.version: 1.3
media.gmp-manager.lastCheck: 1425537884
network.cookie.prefsMigrated: true
places.history.expiration.transient_current_max_pages: 80469
plugin.disable_full_page_plugin_for_types: application/pdf
plugin.importedState: true
privacy.sanitize.migrateFx3Prefs: true
Important Locked Preferences
JavaScript
Incremental GC: true
Accessibility
Activated: false
Prevent Accessibility: 0
Library Versions
NSPR
Expected minimum version: 4.10.7
Version in use: 4.10.7
NSS
Expected minimum version: 3.17.4 Basic ECC
Version in use: 3.17.4 Basic ECC
NSSSMIME
Expected minimum version: 3.17.4 Basic ECC
Version in use: 3.17.4 Basic ECC
NSSSSL
Expected minimum version: 3.17.4 Basic ECC
Version in use: 3.17.4 Basic ECC
NSSUTIL
Expected minimum version: 3.17.4
Version in use: 3.17.4
Experimental Features
---------------------

After reading several posts in the Support Forum I tried a solution. I deleted the "sessionstore-backups" folder.
Please try this: click the menu button ≡ and then click help ? > troubleshooting information > profile folder - "show folder". Then a new window will open up. In this window look out for a folder named "sessionstore-backups", delete this folder and restart firefox afterwards.
The problem was resolved.

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Please try this: click the menu button ≡ and then click help ? > troubleshooting information > profile folder - "show folder". Then a new window will open up. In this window look out for a folder named "sessionstore-backups", delete this folder and restart firefox afterwards.
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