If you use Delete browsing, search and download history on Firefox in Firefox 3.5/6 or Clear Private Data in Firefox 3 to clear the 'Browsing History' when Firefox is closed then restoring tabs from the last session (e.g. "Save & Quit" or "Show my windows and tabs from last time") doesn't work.

It would be nice if Firefox presented a warning or prompt when these settings conflict with each other.

Btw, this also occurs when you have selected Privacy settings including "Use custom settings for history" and then "Automatically start Firefox in a private browsing session"

I have the same problem even though I have Firefox set to remember the history. I have stopped using Firefox because of this and will likely uninstall it soon if this isn't remedied. My troubleshooting info is below. Please help!

 Application Basics

       Name
       Firefox

       Version
       4.0.1

       User Agent
       Mozilla/5.0 (Windows NT 6.0; rv:2.0.1) Gecko/20100101 Firefox/4.0.1

       Profile Directory

         Open Containing Folder

       Enabled Plugins

         about:plugins

       Build Configuration

         about:buildconfig

 Extensions

       Name

       Version

       Enabled

       ID

       AddThis
       3.1.1
       true
       {3e0e7d2a-070f-4a47-b019-91fe5385ba79}

       DownloadHelper
       4.8.6
       true
       {b9db16a4-6edc-47ec-a1f4-b86292ed211d}

       Easy Youtube Video Downloader
       4.1
       true
       {c0c9a2c7-2e5c-4447-bc53-97718bc91e1b}

       HP Smart Web Printing
       4.05
       false
       smartwebprinting@hp.com

       Move Media Player
       7
       true
       moveplayer@movenetworks.com

       Skype extension for Firefox
       3.3.0.3971
       false
       {B13721C7-F507-4982-B2E5-502A71474FED}

       Java Console
       6.0.03
       false
       {CAFEEFAC-0016-0000-0003-ABCDEFFEDCBA}

       Java Console
       6.0.07
       false
       {CAFEEFAC-0016-0000-0007-ABCDEFFEDCBA}

       Java Console
       6.0.10
       false
       {CAFEEFAC-0016-0000-0010-ABCDEFFEDCBA}

       Java Console
       6.0.12
       false
       {CAFEEFAC-0016-0000-0012-ABCDEFFEDCBA}

       Java Console
       6.0.13
       false
       {CAFEEFAC-0016-0000-0013-ABCDEFFEDCBA}

       Java Console
       6.0.15
       false
       {CAFEEFAC-0016-0000-0015-ABCDEFFEDCBA}

       Java Console
       6.0.17
       false
       {CAFEEFAC-0016-0000-0017-ABCDEFFEDCBA}

       Java Console
       6.0.20
       false
       {CAFEEFAC-0016-0000-0020-ABCDEFFEDCBA}

       Java Console
       6.0.21
       false
       {CAFEEFAC-0016-0000-0021-ABCDEFFEDCBA}

       Java Console
       6.0.22
       false
       {CAFEEFAC-0016-0000-0022-ABCDEFFEDCBA}

       Java Console
       6.0.24
       false
       {CAFEEFAC-0016-0000-0024-ABCDEFFEDCBA}

       Microsoft .NET Framework Assistant
       0.0.0
       true
       {20a82645-c095-46ed-80e3-08825760534b}

       Google Gears
       0.5.36.0
       false
       {000a9d1c-beef-4f90-9363-039d445309b8}

       Google Toolbar for Firefox
       7.1.20100408Wb1
       false
       {3112ca9c-de6d-4884-a869-9855de68056c}

       RealPlayer Browser Record Plugin
       14.0.3
       true
       {ABDE892B-13A8-4d1b-88E6-365A6E755758}

       DivX Plus Web Player HTML5 

       DivX HiQ
       2.1.1.94
       false
       {6904342A-8307-11DF-A508-4AE2DFD72085}

Here is the second installment of my troubleshooting info:

Modified Preferences

     Name

     Value

       accessibility.typeaheadfind.flashBar
       0

       browser.history_expire_days.mirror
       180

       browser.places.importBookmarksHTML
       false

       browser.places.importDefaults
       false

       browser.places.leftPaneFolderId
       -1

       browser.places.migratePostDataAnnotations
       false

       browser.places.smartBookmarksVersion
       2

       browser.places.updateRecentTagsUri
       false

       browser.startup.homepage
       http://www.google.com/ig?hl=en&source=iglk

       browser.startup.homepage_override.buildID
       20110413222027

       browser.startup.homepage_override.mstone
       rv:2.0.1

       extensions.lastAppVersion
       4.0.1

       gfx.blacklist.direct2d
       2

       gfx.blacklist.layers.direct3d10
       2

       gfx.blacklist.layers.direct3d10-1
       2

       network.cookie.prefsMigrated
       true

       places.database.lastMaintenance
       1305003911

       places.history.expiration.transient_current_max_pages
       112400

       places.last_vacuum
       1300035447

Here is the next installment of my troubleshooting data:

 Modified Preferences

     Name

     Value

       print.print_printer
       HP Photosmart C7200 series

       print.printer_HP_Photosmart_C7200_series.print_bgcolor
       false

       print.printer_HP_Photosmart_C7200_series.print_bgimages
       false

       print.printer_HP_Photosmart_C7200_series.print_command

       print.printer_HP_Photosmart_C7200_series.print_downloadfonts
       false

       print.printer_HP_Photosmart_C7200_series.print_edge_bottom
       0

       print.printer_HP_Photosmart_C7200_series.print_edge_left
       0

       print.printer_HP_Photosmart_C7200_series.print_edge_right
       0

       print.printer_HP_Photosmart_C7200_series.print_edge_top
       0

       print.printer_HP_Photosmart_C7200_series.print_evenpages
       true

       print.printer_HP_Photosmart_C7200_series.print_footercenter

       print.printer_HP_Photosmart_C7200_series.print_footerleft
       &PT

       print.printer_HP_Photosmart_C7200_series.print_footerright
       &D

       print.printer_HP_Photosmart_C7200_series.print_headercenter

       print.printer_HP_Photosmart_C7200_series.print_headerleft
       &T

       print.printer_HP_Photosmart_C7200_series.print_headerright
       &U

       print.printer_HP_Photosmart_C7200_series.print_in_color
       true

       print.printer_HP_Photosmart_C7200_series.print_margin_bottom
       0.5

       print.printer_HP_Photosmart_C7200_series.print_margin_left
       0.5

       print.printer_HP_Photosmart_C7200_series.print_margin_right
       0.5

       print.printer_HP_Photosmart_C7200_series.print_margin_top
       0.5

       print.printer_HP_Photosmart_C7200_series.print_oddpages
       true

       print.printer_HP_Photosmart_C7200_series.print_orientation
       0

       print.printer_HP_Photosmart_C7200_series.print_pagedelay
       500

       print.printer_HP_Photosmart_C7200_series.print_paper_data
       1

       print.printer_HP_Photosmart_C7200_series.print_paper_height
       11.00

       print.printer_HP_Photosmart_C7200_series.print_paper_size_type
       0

       print.printer_HP_Photosmart_C7200_series.print_paper_size_unit
       0

       print.printer_HP_Photosmart_C7200_series.print_paper_width
       8.50

       print.printer_HP_Photosmart_C7200_series.print_reversed
       false

       print.printer_HP_Photosmart_C7200_series.print_scaling
       1.00

       print.printer_HP_Photosmart_C7200_series.print_shrink_to_fit
       true

       print.printer_HP_Photosmart_C7200_series.print_to_file
       false

       print.printer_HP_Photosmart_C7200_series.print_unwriteable_margin_bottom
       0

       print.printer_HP_Photosmart_C7200_series.print_unwriteable_margin_left
       0

       print.printer_HP_Photosmart_C7200_series.print_unwriteable_margin_right
       0

       print.printer_HP_Photosmart_C7200_series.print_unwriteable_margin_top
       0

       print.printer_Microsoft_XPS_Document_Writer.print_bgcolor
       false

       print.printer_Microsoft_XPS_Document_Writer.print_bgimages
       false

       print.printer_Microsoft_XPS_Document_Writer.print_command

       print.printer_Microsoft_XPS_Document_Writer.print_downloadfonts
       false

       print.printer_Microsoft_XPS_Document_Writer.print_edge_bottom
       0

       print.printer_Microsoft_XPS_Document_Writer.print_edge_left
       0

       print.printer_Microsoft_XPS_Document_Writer.print_edge_right
       0

       print.printer_Microsoft_XPS_Document_Writer.print_edge_top
       0

       print.printer_Microsoft_XPS_Document_Writer.print_evenpages
       true

       print.printer_Microsoft_XPS_Document_Writer.print_footercenter

       print.printer_Microsoft_XPS_Document_Writer.print_footerleft
       &PT

       print.printer_Microsoft_XPS_Document_Writer.print_footerright
       &D

       print.printer_Microsoft_XPS_Document_Writer.print_headercenter

       print.printer_Microsoft_XPS_Document_Writer.print_headerleft
       &T

       print.printer_Microsoft_XPS_Document_Writer.print_headerright
       &U

       print.printer_Microsoft_XPS_Document_Writer.print_in_color
       true

       print.printer_Microsoft_XPS_Document_Writer.print_margin_bottom
       0.5

       print.printer_Microsoft_XPS_Document_Writer.print_margin_left
       0.5

       print.printer_Microsoft_XPS_Document_Writer.print_margin_right
       0.5

       print.printer_Microsoft_XPS_Document_Writer.print_margin_top
       0.5

       print.printer_Microsoft_XPS_Document_Writer.print_oddpages
       true

       print.printer_Microsoft_XPS_Document_Writer.print_orientation
       0

       print.printer_Microsoft_XPS_Document_Writer.print_pagedelay
       500

       print.printer_Microsoft_XPS_Document_Writer.print_paper_data
       1

       print.printer_Microsoft_XPS_Document_Writer.print_paper_height
       11.00

       print.printer_Microsoft_XPS_Document_Writer.print_paper_size_type
       0

       print.printer_Microsoft_XPS_Document_Writer.print_paper_size_unit
       0

       print.printer_Microsoft_XPS_Document_Writer.print_paper_width
       8.50

       print.printer_Microsoft_XPS_Document_Writer.print_reversed
       false

       print.printer_Microsoft_XPS_Document_Writer.print_scaling
       1.00

       print.printer_Microsoft_XPS_Document_Writer.print_shrink_to_fit
       true

       print.printer_Microsoft_XPS_Document_Writer.print_to_file
       false

       print.printer_Microsoft_XPS_Document_Writer.print_unwriteable_margin_bottom
       0

       print.printer_Microsoft_XPS_Document_Writer.print_unwriteable_margin_left
       0

       print.printer_Microsoft_XPS_Document_Writer.print_unwriteable_margin_right
       0

       print.printer_Microsoft_XPS_Document_Writer.print_unwriteable_margin_top
       0

       print.printer_Send_To_OneNote_2007.print_bgcolor
       false

Here is the final installment of my troubleshooting data:

Modified Preferences

    Name

    Value

print.printer_Send_To_OneNote_2007.print_bgimages

       false

       print.printer_Send_To_OneNote_2007.print_command

       print.printer_Send_To_OneNote_2007.print_downloadfonts
       false

       print.printer_Send_To_OneNote_2007.print_edge_bottom
       0

       print.printer_Send_To_OneNote_2007.print_edge_left
       0

       print.printer_Send_To_OneNote_2007.print_edge_right
       0

       print.printer_Send_To_OneNote_2007.print_edge_top
       0

       print.printer_Send_To_OneNote_2007.print_evenpages
       true

       print.printer_Send_To_OneNote_2007.print_footercenter

       print.printer_Send_To_OneNote_2007.print_footerleft
       &PT

       print.printer_Send_To_OneNote_2007.print_footerright
       &D

       print.printer_Send_To_OneNote_2007.print_headercenter

       print.printer_Send_To_OneNote_2007.print_headerleft
       &T

       print.printer_Send_To_OneNote_2007.print_headerright
       &U

       print.printer_Send_To_OneNote_2007.print_in_color
       true

       print.printer_Send_To_OneNote_2007.print_margin_bottom
       0.5

       print.printer_Send_To_OneNote_2007.print_margin_left
       0.5

       print.printer_Send_To_OneNote_2007.print_margin_right
       0.5

       print.printer_Send_To_OneNote_2007.print_margin_top
       0.5

       print.printer_Send_To_OneNote_2007.print_oddpages
       true

       print.printer_Send_To_OneNote_2007.print_orientation
       0

       print.printer_Send_To_OneNote_2007.print_pagedelay
       500

       print.printer_Send_To_OneNote_2007.print_paper_data
       1

       print.printer_Send_To_OneNote_2007.print_paper_height
       11.00

       print.printer_Send_To_OneNote_2007.print_paper_size_type
       0

       print.printer_Send_To_OneNote_2007.print_paper_size_unit
       0

       print.printer_Send_To_OneNote_2007.print_paper_width
       8.50

       print.printer_Send_To_OneNote_2007.print_reversed
       false

       print.printer_Send_To_OneNote_2007.print_scaling
       1.00

       print.printer_Send_To_OneNote_2007.print_shrink_to_fit
       true

       print.printer_Send_To_OneNote_2007.print_to_file
       false

       print.printer_Send_To_OneNote_2007.print_unwriteable_margin_bottom
       0

       print.printer_Send_To_OneNote_2007.print_unwriteable_margin_left
       0

       print.printer_Send_To_OneNote_2007.print_unwriteable_margin_right
       0

       print.printer_Send_To_OneNote_2007.print_unwriteable_margin_top
       0

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_bgcolor
       false

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_bgimages
       false

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_command

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_downloadfonts
       false

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_edge_bottom
       0

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_edge_left
       0

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_edge_right
       0

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_edge_top
       0

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_evenpages
       true

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_footercenter

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_footerleft
       &PT

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_footerright
       &D

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_headercenter

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_headerleft
       &T

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_headerright
       &U

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_in_color
       true

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_margin_bottom
       0.5

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_margin_left
       0.5

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_margin_right
       0.5

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_margin_top
       0.5

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_oddpages
       true

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_orientation
       0

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_pagedelay
       500

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_paper_data
       1

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_paper_height
       11.00

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_paper_size_type
       0

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_paper_size_unit
       0

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_paper_width
       8.50

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_reversed
       false

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_scaling
       1.00

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_shrink_to_fit
       true

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_to_file
       false

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_unwriteable_margin_bottom
       0

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_unwriteable_margin_left
       0

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_unwriteable_margin_right
       0

       print.printer_\\Thomas-PC\Brother_MFC-240C_USB_Printer.print_unwriteable_margin_top
       0

       privacy.cpd.extensions-sessionmanager
       false

       privacy.cpd.siteSettings
       true

       privacy.sanitize.migrateFx3Prefs
       true

       privacy.sanitize.timeSpan
       0

       security.warn_entering_weak
       false

       security.warn_viewing_mixed
       false

 Graphics

       Adapter Description
       Mobile Intel(R) 965 Express Chipset Family

       Vendor ID
       8086

       Device ID
       2a02

       Adapter RAM
       Unknown

       Adapter Drivers
       igdumd32

       Driver Version
       7.14.10.1409

       Driver Date
       1-2-2008

       Direct2D Enabled
       false

       DirectWrite Enabled
       false (7.0.6002.18409, font cache 2.54 MB)

       WebGL Renderer
       (WebGL unavailable)

       GPU Accelerated Windows
       0/1