Why Firefox automatically clearing cookies/cache?

Question

Recently Firefox has been automatically clearing all log-ins and passwords on a seemingly random basis.
After closing a browser window, I launched Firefox, and all of my standard logins (emails, homepage, etc.) have been cleared. This has happened 3 times now at seemingly random times. I'll go for weeks without an issue, and at one point open a browser and everything is logged out. This is after a successful close - no error shutdown, same day as other uses without issue.

Answer 1

Application Basics
Name: Firefox
Version: 33.0.2
User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:33.0) Gecko/20100101 Firefox/33.0
Multiprocess Windows: 0/1
Crash Reports for the Last 3 Days
All Crash Reports
Extensions
Name: Daily Dilbert
Version: 2.7.8
Enabled: true
ID: {C598822D-6E25-4ADB-9137-D52C050F315C}
Name: Symantec Intrusion Prevention
Version: 12.3.0.3 - 1
Enabled: false
ID: {BBDA0591-3099-440a-AA10-41764D9DB4DB}
Graphics
Adapter Description: Intel(R) HD Graphics 4000
Adapter Description (GPU #2): NVIDIA NVS 5200M
Adapter Drivers: igdumd64 igd10umd64 igd10umd64 igdumd32 igd10umd32 igd10umd32
Adapter Drivers (GPU #2): nvd3dumx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um
Adapter RAM: Unknown
Adapter RAM (GPU #2): 1024
Device ID: 0x0166
Device ID (GPU #2): 0x0dfc
Direct2D Enabled: true
DirectWrite Enabled: true (6.2.9200.16492)
Driver Date: 2-1-2012
Driver Date (GPU #2): 2-21-2012
Driver Version: 8.15.10.2639
Driver Version (GPU #2): 8.17.12.9077
GPU #2 Active: false
GPU Accelerated Windows: 1/1 Direct3D 11 (OMTC)
Vendor ID: 0x8086
Vendor ID (GPU #2): 0x10de
WebGL Renderer: Google Inc. -- ANGLE (Intel(R) HD Graphics 4000 Direct3D9Ex vs_3_0 ps_3_0)
windowLayerManagerRemote: true
AzureCanvasBackend: direct2d
AzureContentBackend: direct2d
AzureFallbackCanvasBackend: cairo
AzureSkiaAccelerated: 0
Important Modified Preferences
accessibility.typeaheadfind.flashBar: 0
browser.cache.disk.capacity: 358400
browser.cache.disk.smart_size_cached_value: 358400
browser.cache.disk.smart_size.first_run: false
browser.cache.disk.smart_size.use_old_max: false
browser.cache.frecency_experiment: 4
browser.places.smartBookmarksVersion: 7
browser.search.useDBForOrder: true
browser.sessionstore.upgradeBackup.latestBuildID: 20141027150301
browser.startup.homepage: http://www.ighome.com/?t=298336
browser.startup.homepage_override.buildID: 20141027150301
browser.startup.homepage_override.mstone: 33.0.2
browser.tabs.warnOnClose: false
dom.mozApps.used: true
extensions.lastAppVersion: 33.0.2
font.internaluseonly.changed: true
gfx.direct3d.last_used_feature_level_idx: 0
media.gmp-gmpopenh264.lastUpdate: 1414664915
media.gmp-gmpopenh264.version: 1.1
media.gmp-manager.lastCheck: 1414778207
network.cookie.prefsMigrated: true
places.database.lastMaintenance: 1414772540
places.history.expiration.transient_current_max_pages: 104858
plugin.disable_full_page_plugin_for_types:
plugin.importedState: true
print.printer_PDFCreator.print_bgcolor: false
print.printer_PDFCreator.print_bgimages: false
print.printer_PDFCreator.print_colorspace:
print.printer_PDFCreator.print_command:
print.printer_PDFCreator.print_downloadfonts: false
print.printer_PDFCreator.print_duplex: 0
print.printer_PDFCreator.print_edge_bottom: 0
print.printer_PDFCreator.print_edge_left: 0
print.printer_PDFCreator.print_edge_right: 0
print.printer_PDFCreator.print_edge_top: 0
print.printer_PDFCreator.print_evenpages: true
print.printer_PDFCreator.print_footercenter:
print.printer_PDFCreator.print_footerleft: &PT
print.printer_PDFCreator.print_footerright: &D
print.printer_PDFCreator.print_headercenter:
print.printer_PDFCreator.print_headerleft: &T
print.printer_PDFCreator.print_headerright: &U
print.printer_PDFCreator.print_in_color: true
print.printer_PDFCreator.print_margin_bottom: 0.5
print.printer_PDFCreator.print_margin_left: 0.5
print.printer_PDFCreator.print_margin_right: 0.5
print.printer_PDFCreator.print_margin_top: 0.5
print.printer_PDFCreator.print_oddpages: true
print.printer_PDFCreator.print_orientation: 0
print.printer_PDFCreator.print_page_delay: 50
print.printer_PDFCreator.print_paper_data: 9
print.printer_PDFCreator.print_paper_height: 297.00
print.printer_PDFCreator.print_paper_name:
print.printer_PDFCreator.print_paper_size_type: 1
print.printer_PDFCreator.print_paper_size_unit: 1
print.printer_PDFCreator.print_paper_width: 210.00
print.printer_PDFCreator.print_plex_name:
print.printer_PDFCreator.print_resolution: 348798672
print.printer_PDFCreator.print_resolution_name:
print.printer_PDFCreator.print_reversed: false
print.printer_PDFCreator.print_scaling: 1.00
print.printer_PDFCreator.print_shrink_to_fit: true
print.printer_PDFCreator.print_to_file: false
print.printer_PDFCreator.print_unwriteable_margin_bottom: 0
print.printer_PDFCreator.print_unwriteable_margin_left: 0
print.printer_PDFCreator.print_unwriteable_margin_right: 0
print.printer_PDFCreator.print_unwriteable_margin_top: 0
privacy.sanitize.migrateFx3Prefs: true
privacy.sanitize.timeSpan: 0
security.csp.enable: false
security.OCSP.enabled: 0
storage.vacuum.last.index: 1
storage.vacuum.last.places.sqlite: 1413803235
user.js Preferences
Your profile folder contains a user.js file, which includes preferences that were not created by Firefox.
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: 3.17.1 Basic ECC
Version in use: 3.17.1 Basic ECC
NSSSMIME
Expected minimum version: 3.17.1 Basic ECC
Version in use: 3.17.1 Basic ECC
NSSSSL
Expected minimum version: 3.17.1 Basic ECC
Version in use: 3.17.1 Basic ECC
NSSUTIL
Expected minimum version: 3.17.1
Version in use: 3.17.1
Experimental Features
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