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How do I stop Firefox 4 from automatically entering Private Browsing mode?

Posted

It appears to randomly enter Private Browsing mode. When I check the history when Firefox is open, it will appear but when I exit and restart The history is clear. I think it is possibly triggered by https sites but I'm not sure, so it appears to be random. I have never used nor turned on Private Browsing.

Modified by cleverlymadeup

Chosen solution

You have a corrupted user agent the identifies you as Firefox/3.0.10

  • Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10; .NET CLR 3.0; ffco7) Gecko/2009042316 Firefox/3.0.10

See also:


  • 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
  • Uncheck: [ ] "Automatically start Firefox in a private browsing session"

See also:

Start Firefox in Troubleshoot Firefox issues using Safe Mode to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).

  • Don't make any changes on the Safe mode start window.

See:

Read this answer in context 3

Additional System Details

Installed Plug-ins

  • 6.0.12.1739
  • RealPlayer(tm) LiveConnect-Enabled Plug-In
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • Adobe PDF Plug-In For Firefox and Netscape "9.4.2"
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Shockwave Flash 10.2 r152
  • Google Update
  • Adobe Shockwave for Director Netscape plug-in, version 11.5.9.615
  • iTunes Detector Plug-in
  • Picasa plugin
  • Next Generation Java Plug-in 1.6.0_24 for Mozilla browsers
  • Yahoo Application State Plugin version 1.0.0.7
  • 4.0.60129.0
  • Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
  • Npdsplay dll
  • DRM Store Netscape Plugin
  • DRM Netscape Network Object

Application

  • User Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10; .NET CLR 3.0; ffco7) Gecko/2009042316 Firefox/3.0.10

More Information

Application Basics
Name
Firefox
Version
4.0
User Agent
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10; .NET CLR 3.0; ffco7) Gecko/2009042316 Firefox/3.0.10
Profile Directory
Open Containing Folder
Enabled Plugins
about:plugins
Build Configuration
about:buildconfig
Extensions
Name
Version
Enabled
ID
Microsoft .NET Framework Assistant
1.2.1
false
{20a82645-c095-46ed-80e3-08825760534b}
Google Toolbar for Firefox
7.1.20101113Wb1
true
{3112ca9c-de6d-4884-a869-9855de68056c}
Gmail Manager
0.6.4.1
true
{582195F5-92E7-40a0-A127-DB71295901D7}
DownloadHelper
4.8.4
true
{b9db16a4-6edc-47ec-a1f4-b86292ed211d}
Tab Mix Plus
0.3.8.5
true
{dc572301-7619-498c-a57d-39143191b318}
Mouse Gestures Redox
3.0.0
false
{FFA36170-80B1-4535-B0E3-A4569E497DD0}
Skype extension
5.0.0.6906
false
{AB2CE124-6272-4b12-94A9-7303C7397BD1}
Java Console
6.0.20
true
{CAFEEFAC-0016-0000-0020-ABCDEFFEDCBA}
Java Console
6.0.21
true
{CAFEEFAC-0016-0000-0021-ABCDEFFEDCBA}
Java Console
6.0.22
true
{CAFEEFAC-0016-0000-0022-ABCDEFFEDCBA}
Java Console
6.0.23
true
{CAFEEFAC-0016-0000-0023-ABCDEFFEDCBA}
Java Console
6.0.24
true
{CAFEEFAC-0016-0000-0024-ABCDEFFEDCBA}
Java Quick Starter
1.0
true
jqs@sun.com
FireGestures
1.6.1
true
firegestures@xuldev.org
Modified Preferences
Name
Value
accessibility.typeaheadfind.flashBar
0
browser.fixup.alternate.enabled
false
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_override.buildID
20110318052756
browser.startup.homepage_override.mstone
rv:2.0
browser.tabs.loadBookmarksInBackground
true
browser.tabs.loadDivertedInBackground
true
extensions.lastAppVersion
4.0
general.useragent.extra.microsoftdotnet
( .NET CLR 3.5.30729; .NET4.0E)
general.useragent.override
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10; .NET CLR 3.0; ffco7) Gecko/2009042316 Firefox/3.0.10
network.cookie.prefsMigrated
true
places.database.lastMaintenance
1301170289
places.history.expiration.transient_current_max_pages
64376
places.last_vacuum
1295678765
print.print_bgcolor
false
print.print_bgimages
false
print.print_command
print.print_downloadfonts
false
print.print_evenpages
true
print.print_in_color
true
print.print_margin_bottom
0.5
print.print_margin_left
0.5
print.print_margin_right
0.5
print.print_margin_top
0.5
print.print_oddpages
true
print.print_orientation
0
print.print_pagedelay
500
print.print_paper_data
0
print.print_paper_height
11.00
print.print_paper_size_type
1
print.print_paper_size_unit
0
print.print_paper_width
8.50
print.print_printer
PDFCreator
print.print_reversed
false
print.print_scaling
1.00
print.print_shrink_to_fit
true
print.print_to_file
false
print.print_unwriteable_margin_bottom
0
print.print_unwriteable_margin_left
0
print.print_unwriteable_margin_right
0
print.print_unwriteable_margin_top
0
print.printer_PDFCreator.print_bgcolor
false
print.printer_PDFCreator.print_bgimages
false
print.printer_PDFCreator.print_command
print.printer_PDFCreator.print_downloadfonts
true
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_pagedelay
500
print.printer_PDFCreator.print_paper_data
9
print.printer_PDFCreator.print_paper_height
11.00
print.printer_PDFCreator.print_paper_size
1841757590
print.printer_PDFCreator.print_paper_size_type
0
print.printer_PDFCreator.print_paper_size_unit
1
print.printer_PDFCreator.print_paper_width
8.50
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.cpd.downloads
false
privacy.cpd.extensions-tabmix
false
privacy.cpd.formdata
false
privacy.cpd.history
false
privacy.cpd.sessions
false
privacy.sanitize.migrateFx3Prefs
true
privacy.sanitize.timeSpan
0
security.warn_viewing_mixed.show_once
false
Graphics
Adapter Description
NVIDIA GeForce GTS 250
Vendor ID
10de
Device ID
0615
Adapter RAM
Unknown
Adapter Drivers
nv4_disp
Driver Version
6.14.12.5896
Driver Date
7-9-2010
Direct2D Enabled
false
DirectWrite Enabled
false (0.0.0.0, font cache n/a)
WebGL Renderer
Google Inc. -- ANGLE -- OpenGL ES 2.0 (ANGLE 0.0.0.541)
GPU Accelerated Windows
2/2 Direct3D 9

the-edmeister
  • Top 10 Contributor
  • Moderator
3196 solutions 24401 answers

Firefox 3.0.10 doesn't have a Private Browsing mode, that was added to Firefox in version 3.5.

Question owner

It's not version 3.0.10. Like the question states it's Firefox 4

cor-el
  • Top 10 Contributor
  • Moderator
10752 solutions 96760 answers

Chosen Solution

You have a corrupted user agent the identifies you as Firefox/3.0.10

  • Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.10; .NET CLR 3.0; ffco7) Gecko/2009042316 Firefox/3.0.10

See also:


  • 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
  • Uncheck: [ ] "Automatically start Firefox in a private browsing session"

See also:

Start Firefox in Troubleshoot Firefox issues using Safe Mode to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).

  • Don't make any changes on the Safe mode start window.

See:

Question owner

Actually it seems to be something with the FireGestures. I had uninstalled FF and deleted the preferences and such. So I had a fresh copy of the browser. It still did the same thing. Disabled FireGestures and it stopped doing it.

Now I need to find a good mouse gesture addon

Question owner

Actually this wasn't solved. It's not really Private Browsing as much as history just stops being added. It's not an add-on, it's something with FireFox 4. It seems that https triggers it.