Firefox randomly reset it's self to deafault mode (but retained bookmarks), now won't retain cookies after closing firefox even though it's set to.

I was using Firefox last week and all of a sudden it crashed, when I started it back up again everything had been set back to factory default (but it kept my bookmarks). From then on it has refused to save cookies, I've been all through settings and everything is the way it should be. I have no add-ons that mess with cookies. I have no user.js file messing with anything. I've tried resetting firefox which did nothing, and I've completely uninstalled and reinstalled firefox. Nothing seems to fix the problem, every single time I close firefox or restart my computer I end up having to sign into every single website I go to....what gives?

If clearing cookies doesn't work then it is possible that the cookies.sqlite file that stores the cookies is corrupted.
Rename (or delete) cookies.sqlite (cookies.sqlite.old) and delete other present cookies files like cookies.sqlite-journal in the Firefox profile folder in case the file cookies.sqlite got corrupted.
*http://kb.mozillazine.org/Cookies
*https://support.mozilla.org/kb/Deleting+cookies
You can use this button to go to the Firefox profile folder:
*Help > Troubleshooting Information > Profile Directory: Show Folder (Linux: Open Directory; Mac: Show in Finder)

Similar Messages

Can I prevent Firefox from attempting to restore all windows after a crash (even though I have set it to start with a blank page)?

Given that some of the open windows are probably what made it crash in the first instance, this is very annoying. Sometimes it gives me an error message apologising for not being able to load the pages, but often it just tries again.

You can do this by changing a hidden preference.
# Type '''about:config''' into the location bar and press enter
# Accept the warning that appears, this will then bring up a list of preferences
# Type '''crash''' into the filter box
# Double-click on the preference browser.sessionstore.resume_from_crash to change its value to '''false'''

I reset my Apple ID and password online over the phone with a consultant ,but my I pod won't show that anything had changed even though everything's fine online. I can't do anything on my IPod so I need to fix this now!!

Help please

On the iPad - go to Settings>iTunes and App Stores>Apple ID. Tap on your old ID and sign out. Then sign in with your changed/new ID.

Setting won't save after closing firefox

Hi,
When I open Firefox it search my addons for compatibility with the version of my firefox, after then it open up with all my closed tabs and a notification about updating one of my addon.
I tried to change my setting so it won't open all closed tabs when starting but whenever I close firefox it reset my settings and the next time start the same way.
I tried also to reinstall firefox but it did nothing.
How do I fix it?
Asaf.

It is possible that there is a problem with the file(s) that store the extensions registry or with the compatibility.ini file.
Delete the extensions.* files (e.g. extensions.json, extensions.sqlite, extensions.ini) and compatibility.ini in the Firefox profile folder to reset the extensions registry.
*https://support.mozilla.org/kb/Profiles
New files will be created when required.
See "Corrupt extension files":
*http://kb.mozillazine.org/Unable_to_install_themes_or_extensions
*https://support.mozilla.org/kb/Unable+to+install+add-ons
If you see disabled or not compatible extensions in "Firefox/Tools > Add-ons > Extensions" then click the Tools button at the left end of the Search bar to check if there is a compatibility update available.
If this hasn't helped then also delete possible addons.json and addons.sqlite files.
You can also check for problems with preferences.
Delete a possible user.js file and numbered prefs-##.js files and rename (or delete) the prefs.js file to reset all prefs to the default value including prefs set via user.js and prefs that are no longer supported in the current Firefox release.
*http://kb.mozillazine.org/Preferences_not_saved
*http://kb.mozillazine.org/Resetting_preferences

I keep getting this message after closing Firefox and attempt to reopen-Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system.

I keep getting this message after closing Firefox and attempt to reopen-Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system.

See:
* http://kb.mozillazine.org/Recovering_a_missing_profile
* http://kb.mozillazine.org/Profile_in_use

Error window after closing Firefox!

Hi,
After closing Firefox an error window appears. And after closing that window another smaller one appears.
Please help me.
Best Wishes,
Nick

What errors are you having appear?
Try to start Firefox in [[Safe mode|Safe mode]]. This mode disables all extensions, user customizations, hardware acceleration, etc. temporarily for diagnostic and troubleshooting. If Firefox works fine in Safe Mode, then this is likely an add-on issue. Restart Firefox in normal mode, then type "About:addons" (without the quotes) in the address bar. Disable your extensions one by one, restarting Firefox between each one, until you find the trouble maker. Once you do, you can disable that add-on and report the issue to that add-on's developer.
A few other basic trouble shooting things you can try is this:
Run all Windows Updates, install all needed service packs, etc.
Update your graphics driver (Firefox uses your graphics card for some rendering, and an out of date graphics card driver can cause problems. [https://support.mozilla.org/en-US/kb/how-do-i-upgrade-my-graphics-drivers https://support.mozilla.org/en-US/kb/how-do-i-upgrade-my-graphics-drivers].
Update all your plugins (Flash, Java, etc.): [http://www.mozilla.org/plugincheck/ http://www.mozilla.org/plugincheck/].
Download and Install MalwareBytes Anti-Malware, run a full Scan. [http://www.malwarebytes.org/ http://www.malwarebytes.org/]. This helps check that there are no viruses on your computer causing issues. You can uninstall this program after you clean off any infections.

Firefox is not warning when closing multiple tabs, even though it is set to warn me in preferences!

Firefox is not warning when closing multiple tabs, even though it is set to warn me in preferences! Unchecking and rechecking the box does not help, it's as if Firefox is ignoring the option to warn when closing multiple tabs.

You can set the warn prefs on the about:config page to true via the right-click context menu or toggle with a double left-click.
* browser.showQuitWarning, see http://blog.zpao.com/post/3174360617/about-that-quit-dialog
* browser.tabs.warnOnClose, see http://kb.mozillazine.org/About%3Aconfig_entries
* browser.warnOnQuit , see http://kb.mozillazine.org/browser.warnOnQuit
* browser.warnOnRestart , see http://kb.mozillazine.org/browser.warnOnRestart
To open the about:config page, type about:config in the location (address) bar and press the "Enter" key, just like you type the url of a website to open a website. 
If you see a warning then you can confirm that you want to access that page. 
You can use History > Restore Previous Session to get back the previous session. 
There is also a "Restore Previous Session" button on the default about:home Home page.
Another possibility is to use:
*[http://kb.mozillazine.org/Menu_differences Firefox > Preferences] > General > Startup: "When Firefox Starts": "Show my windows and tabs from last time"

After closing Firefox to use IE8 or any other program, everything is very choppy and slow. I have to go into Taskbar, Processes, and close firefox.exe manually (which is using up all the memory/CPU). Then, and only then, does everything behave normally. W

After closing Firefox to use IE8 or any other program (like InterVideo to watch a DVD), everything is very choppy and slow. I have to go into Taskbar, Processes, and close firefox.exe manually (which is using up all the memory/CPU and should have closed before). Then, and only then, does everything behave normally. What is going on and what am I doing wrong or missing??
== This happened ==
Every time Firefox opened
== about a couple months ago and happens every time I close Firefox.

'''Kill Application'''
In Task Manager, does firefox.exe show in the '''Processes''' tab?
See: '''[http://kb.mozillazine.org/Kill_application Kill Application]'''
'''Causes and solutions for Firefox hanging at exit:'''
'''[[Firefox hangs]]'''
'''[http://kb.mozillazine.org/Firefox_hangs#Hang_at_exit Firefox hangs at exit (Mozillazine article)]'''
'''[[Firefox is already running but is not responding]]'''
'''Safe Mode'''
You may need to use '''[[Safe Mode]]''' (click on "Safe Mode" and read) to localize the problem. Firefox SafeMode is a diagnostic mode that disables extensions and some other features of Firefox. If you are using a theme, switch to the DEFAULT theme: Tools > Add-ons > Themes before starting Safe Mode. When entering Safe Mode, do not check any items on the entry window, just click "Continue in Safe Mode". Test to see if the problem you are experiencing is corrected.
See:
'''[[Troubleshooting extensions and themes]]'''
'''[[Troubleshooting plugins]]'''
'''[[Basic Troubleshooting]]'''
If the problem does not occur in Safe-mode then disable all of your extensions and then try to find which is causing it by enabling one at a time until the problem reappears. You have to close and restart Firefox after each change via File > Restart Firefox (on Mac: Firefox > Quit). You can use "Disable all add-ons" on the Safe mode start window.
'''''Other Issues''''': to correct security/stability issues
'''Update Java''': your ver. 1.6.0.19; current ver. 1.6.0.20 (important security update 04-15-2010)
''(Windows users: Do the manual update; very easy.)''
See: '''[http://support.mozilla.com/en-US/kb/Using+the+Java+plugin+with+Firefox#Updates Updating Java]'''
Do the update with Firefox closed.

Stop pop up ad that appears desktop after closing firefox

Need help to stop Firefox advertisement that appears on desktop after closing Firefox. Not very proficient with computers and need help to discontinue this pop-up.
Thanks,
Lynn Johnson

Create a new profile as a test to check if your current profile is causing the problems.
See "Basic Troubleshooting: Make a new profile":
*https://support.mozilla.org/kb/Basic+Troubleshooting#w_8-make-a-new-profile
There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" in case there are still problems.
If the new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.
See:
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox
Do a malware check with some malware scanning programs on the Windows computer. 
You need to scan with all programs because each program detects different malware. 
Make sure that you update each program to get the latest version of their databases before doing a scan. 
*http://www.malwarebytes.org/mbam.php - Malwarebytes' Anti-Malware
*http://www.superantispyware.com/ - SuperAntispyware
*http://www.microsoft.com/security/scanner/en-us/default.aspx - Microsoft Safety Scanner
*http://www.microsoft.com/windows/products/winfamily/defender/default.mspx - Windows Defender: Home Page
*http://www.safer-networking.org/en/index.html - Spybot Search & Destroy
You can also do a check for a rootkit infection with TDSSKiller.
*http://support.kaspersky.com/viruses/solutions?qid=208280684
See also:
*"Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked

After closing Firefox, at times I have to use task manger to shut down firefox.exe*32 at times,

As my title says, after closing Firefox, at times I have to use task manger to shut down firefox.exe*32 at times. I've left it running for up to 5 minutes to see if it shuts down/closes and it doesn't. I've also reloaded Firefox. My system is a Lenovo H210 with 3 gig of Ram and no added video card, the OS is Windows 7 Ultimate 64 bit SP1. I realize the memory is on the small side. I did try to update VLC player this morning to V 2.1.2 but it fails to run after instal due to file errors.
Bill

Hello,
'''Try Firefox Safe Mode''' to see if the problem goes away. Safe Mode is a troubleshooting mode, which disables most add-ons.
''(If you're not using it, switch to the Default theme.)''
* On Windows you can open Firefox 4.0+ in Safe Mode by holding the '''Shift''' key when you open the Firefox desktop or Start menu shortcut.
* On Mac you can open Firefox 4.0+ in Safe Mode by holding the '''option''' key while starting Firefox.
* On Linux you can open Firefox 4.0+ in Safe Mode by quitting Firefox and then going to your Terminal and running: firefox -safe-mode (you may need to specify the Firefox installation path e.g. /usr/lib/firefox)
* Or open the Help menu and click on the '''Restart with Add-ons Disabled...''' menu item while Firefox is running.
[[Image:FirefoxSafeMode|width=520]]
''Once you get the pop-up, just select "'Start in Safe Mode"''
[[Image:Safe Mode Fx 15 - Win]]
'''''If the issue is not present in Firefox Safe Mode''''', your problem is probably caused by an extension, and you need to figure out which one. Please follow the [[Troubleshooting extensions and themes]] article for that.
''To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.''
''When you figure out what's causing your issues, please let us know. It might help other users who have the same problem.''
Thank you.

Hardware acceleration in Firefox 4 fluctuates my gpu clock speed and for some period of browsing will hang the gpu at the highest clock speed available even after closing Firefox 4.

After browsing heavily in Firefox 4 for some time, my gpu (ATI 5870 with the latest drivers) will stay clocked at the highest clock speed of 850Mhz and memory clock speed of 1200Mhz. Even after closing Firefox 4, the gpu will not down-clock and stay at those highest speed. I've tested the same browsing pattern on IE9 and in which this problem didn't exist so I don't think it's a driver issue. I now have to browse with hardware acceleration turned off to ensure I don't get this problem.

Ive downgraded from FF4 to 3.6 at this point. The CPU usage is out of control on OS X.

Firefox will not open a bookmark in a new tab even though it is set in tools to do this.

I had problems yesterday and "Norton" logged into my machine. Today when I click on a bookmark, it opens in the same tab.

Start Firefox in [[Safe Mode|Safe Mode]] to check if one of the extensions (Firefox/Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Firefox/Tools > Add-ons > Appearance).
*Do NOT click the Reset button on the Safe Mode start window.
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

My Firefox won't let me browse the Internet, even though I'm connected to the Internet.

Excuse me, but my Firefox 3.6 just randomly stopped working. It won't let me browse the Internet anymore-- the error message it always gives me is "Unable to connect", even though I'm fully connected to the Internet. Earlier I opened up Safari and Internet Explorer 9-- both, in which, let me browse the Internet, and I had a full connection. But, whenever I use Firefox now, it says "Unable to connect". And every time I type in a URL on it, Firefox gives me the ''SAME'' error message. I don't know what to do now. I uninstalled and reinstalled Firefox and it does the same thing. So now I am stuck with using Safari, when I really wanna use my Firefox. Why is it doing this?

Make sure you are not set to Work Offline in File menu.
There is a possibility that your connection dropped even briefly, more so if using wireless. Make sure Firefox is not set to "[v] Work Offline" in File menu just above Exit.
By default, Firefox 3.5 and 3.6 will automatically use offline mode if there is no network connection. Under certain conditions, after the connection is reestablished it may remain in offline mode without the user's knowledge. Firefox 4 and newer prevents this behavior by default. To prevent this behavior in versions 3.5 and 3.6, add an entry to the '''about:config''' options, as follows.
* Type '''about:config''' in Location (address) bar
* Right-click on the about:config page to open the right-click context menu and use "New > Boolean" to create a new Boolean preference. Name: '''network.manage-offline-status'''. Value: '''false'''
http://kb.mozillazine.org/Error_loading_any_website#Work_Offline_Setting

Even though i have set firefox to accept cookies it will not do so.

firefox v. 15.0.1

Hi,
You can try deleting the '''cookies.sqlite''' and '''permissions.sqlite''' files in the [http://kb.mozillazine.org/Profile_folder Firefox Profile Folder] after exiting Firefox.
To open the profile folder via Firefox: '''Help''' ('''Alt''' + '''H''') > '''Troubleshooting Information''' > '''Show Folder'''.
[http://kb.mozillazine.org/Profile_folder_-_Firefox Firefox Profile Folder & Files]
If the problem persists you can also Reset Firefox and start afresh. Please note that this may also not help if there are cookie blocking external Windows programs in which case you would have to make adjustments in the external program itself.
The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information.
Note: ''This will cause you to lose any Extensions, Open websites, and some Preferences.''
To Reset Firefox do the following:
#Go to Firefox > Help > Troubleshooting Information.
#Click the "Reset Firefox" button.
#Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
#Firefox will open with all factory defaults applied.
Further information can be found in the [[Reset Firefox – easily fix most problems]] article.
Did this fix your problems? Please report back to us!

Just upgraded to 9.1.0 but my Bookmarks Toolbar doesn't display when I open Firefox (I have to untick then retick it each time in View- Toolbars)!

When I first open Firefox my Bookmarks Toolbar is missing (but it has created the space under the search bar for it). If I untick it then retick it in View->Toolbars it reappears for the session but then disappears again when I reopen Firefox.

Hi,
Please try the [https://support.mozilla.org/en-US/kb/Safe%20Mode Safe Mode] procedure. In the first screen enable (tick) '''Reset toolbars and controls''' and '''Make Changes and Restart'''.
Useful links:
[https://support.mozilla.com/en-US/kb/Options%20window All about Tools > Options]
[http://kb.mozillazine.org/About:config Going beyond Tools > Options - about:config]
[http://kb.mozillazine.org/About:config_entries about:config Entries]
[https://support.mozilla.com/en-US/kb/Page%20Info%20window Page Info] Tools (Alt + T) > Page Info, Right-click > View Page Info
[https://support.mozilla.com/en-US/kb/Keyboard%20shortcuts Keyboard Shortcuts]
[https://support.mozilla.com/en-US/kb/Viewing%20video%20in%20Firefox%20without%20a%20plugin Viewing Video without Plugins]
[http://kb.mozillazine.org/Profile_folder_-_Firefox Firefox Profile Folder & Files]
[https://developer.mozilla.org/en/Command_Line_Options#Browser Firefox Commands]
[https://support.mozilla.com/en-US/kb/Basic%20Troubleshooting Basic Troubleshooting]
[https://support.mozilla.com/en-US/kb/common-questions-after-upgrading-firefox-36 After Upgrading]
[https://support.mozilla.com/en-US/kb/Safe%20Mode Safe Mode]
[http://kb.mozillazine.org/Problematic_extensions Problematic Extensions]
[https://support.mozilla.com/en-US/kb/Troubleshooting%20extensions%20and%20themes Troubleshooting Extensions and Themes]
[https://support.mozilla.com/en-US/kb/Troubleshooting%20plugins Troubleshooting Plugins]
[http://kb.mozillazine.org/Testing_plugins Testing Plugins]

Firefox randomly reset it's self to deafault mode (but retained bookmarks), now won't retain cookies after closing firefox even though it's set to.

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