Firefox 4.0 hangs up (program not responding) on Clear History. Why?

Often, when I choose the Clear Recent History, the program does nothing. Eventually, I choose Cntl-Alt-Del, and choose "end program"
Then I open again, and now I can delete recent history.

I have had this problem ever since updating to Firefox 4.0 running on Windows XP SP3. I found that the problem was with "cookies". If this was checked it would hang and I would get the script error message. Nothing I did would solve the problem till yesterday when I updated to the Firefox 5.0 beta and now the problem is solved. Whatever has changed in this beta release it solved the problem!

Similar Messages

  • Why does Firefox give this message when I do not have another program running "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."

    Question
    why does Firefox give this message when I do not have another program running or another window open - "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." edit

    See also "Hang at exit":
    *http://kb.mozillazine.org/Firefox_hangs
    *https://support.mozilla.com/kb/Firefox+hangs

  • Firefox keeps hanging up and freezing. I get this message. "Firefox is already running, but is not responding. To open a new window, you must first close the existing--what a mess.

    No matter how many times I open and close, firefox hangs up after surfing a few pages. When I look at task master, firefox is using up hundreds of thousands of kb, causing the processor to stall at 100%. I do not have this problem when surfing with IE. I have the latest version of firefox. I never had this problem with version 5. It keeps getting worse with each "update".

    See [[Firefox is already running but is not responding]]
    Obviously firefox should not hang after surfing a few pages. I have Firefox installed on an XP including firefox 6.0.2 and do not have problems.
    See also
    * [[Firefox consumes a lot of CPU resources]]
    * [[High memory usage]]
    Have a read of the above linked articles. The first thing to do is to try to get firefox to behave more normally
    #Use [[safe mode]]
    #* but do not make changes when you have the window with a list of options just click continue
    # if using safe mode does not solve the problem also
    #* make sure you use the default theme
    #* disable all pluggins
    Note by keying in ''about:memory'' into the location bar you will get a report, which includes more info as you roll the mouse pointer over items, that should help indicate where all the memory is being used.

  • Firefox 4 is freezing on GMail tab at frequent intervals on Windows 7, resulting in a message "Program not responding". Remains open but becomes unresponsive for a fill minutes or seconds. And problem repeat, repeat...

    Firefox 4 is freezing on GMail tab at frequent intervals on Windows 7, resulting in a message "Program not responding".
    Remains open but becomes unresponsive for a fill minutes or seconds. And problem repeat, repeat...

    Check this out;
    http://www.clamxav.com/ free malware scanner for Mac OS X
    https://discussions.apple.com/docs/DOC-3291

  • Brand new with performance issues -- programs not responding, system hanging

    Just this morning I began migrating from a Dell Inspiron 1525 laptop that has been generally reliable for the better part of 3 years (monitor housing is literally falling apart but still works great... check E-Bay later for spare parts! lol)... migrating to a Toshiba Satellite C655D-S5136 laptop running Windows 7 64-bit.  It's literally right out of the box 5 hours ago and I've been reinstalling programs, transferring files, etc.
    The problem is that I'm already noticing a lot of performance issues.  The system (and/or programs) seem to get caught often... resulting in frequent "Program not responding" messages (some of which the system manages to bypass)... and a few of the "This program closed unexpectedly" or "This program stopping responding... do you want to check online for a solution or just close the program?" messages.
    This is happening on multiple programs... tax prep software TaxAct update dialog hangs after 256 bytes downloaded every time, AVG Anti-Virus was hanging although never gave me a not responding message, Internet Explorer has stopped responding a couple times, Windows Live Mail did often, especially when I was using IMAP (since changed to POP3 and problem seems to have resolved but still).  Even opening the start menu a few seconds after plugging in an external hard drive lagged the system like hell for a full two minutes until it caught up with itself.
    This is unacceptable in a brand new machine.  I was getting a few errors like this on my Dell every now and then but I chalked it up to an old machine that had never been wiped and had a failing hard disk.  I understand the computer moving slower, especially as I've been installing a lot, running antivirus, downloading all at once, but no way programs should simply stop responding this often.  I could do twice the activity on my Dell and have no issues.
    I've uninstalled several of the preloaded programs... the antivirus, quickbooks, etc.  I've also disabled and/or uninstalled several of the other programs like Toshiba Reeltime and Toshiba Zoom Manager or whatever that was.  Nothing has seemed to help.  And that's not surprising... the speed is great, it's that programs are getting caught so often, sometimes every time or every other time I open up a program.
    Is this a Windows 7 thing? (This is first time using Windows 7, coming from Vista).  Is it a Satellite thing?
    Anyone have any suggestions?  Is it possible there's just some component that's bad?  Processor, RAM, etc.?
    Thanks... very frustrated!

    I may have found a solution. I changed my startup programs and stopped some of the Toshiba software from running at startup. The ones I stopped are listed below. I have used the laptop heavily for two days now and have not had any problems. It actually runs very fast. I hope this will help.
    Toshiba Reel Time
    Toshiba Sleep
    Toshiba PC Health Monitor
    Toshiba WebCamera App.
    Toshiba Power Saver
    Toshiba Message Center
    Toshiba Service Station
    SmartFaceVWatcher
    Toshiba Online Backup
    Toshiba Zooming Utility
    Toshiba eco Utility
    Toshiba App Place 
    Message Center
    For people that don't know how to change these, here are the instructions.
    Click Start > Type msconfig in the search box > open msconfig > click on the startup tab > remove the checkmarks next to the above programs > restart computer.
    Doing this may not fix your problems, but it did fix mine.

  • After most recent update, Firefox keep hanging intermittently with "Not Responding".

    After the most recent update, my Firefox browser begins to hang intermittently with "Not Responding". I have checked the extensions and plug-in like Java, all of them are the latest updated ones. Everytime I open a new site or click on links to load another page, it happens. Every single time.

    '''is there a solution ''(temporary OR permanent)'' for this problem yet?'''
    i tried '''EVERY possible alternative'''; even when opened in ''''''safe mode'''''' or when installed for the first time w| '''NO addons or ANYthing else''' but the '''original default settings''', still does the same thing.
    mozilla people?? really?? no answer|feedback|suggestions, anything at all from u guys??
    if it isnt a version (browser, OS, addons, etc) issue, what is it that separates us from the users not having the problem?
    this is is very frustrating; h|e it's even more frustrating when there is no response from tech support. is it because there havent been enough people who have reported this same issue so there can be some interest & find a fix; OR is it that u dont know; OR that there is not & will not be any fix?
    we cant continue being users if we cannot use it. it's really my favorite browser, but if it doesn't work & u guys dont have a fix for it, then users w| this same problem wont have any other option but to switch to a different browser permanently.
    really mozilla??? nothing? a reply would be very nice...

  • On shut down I always get the message Program Not Responding. This happened before I installed Firefox. It does not pose a problem, that I know of but it does concern me.

    On shut down I always get the message Program Not Responding. This happened before I installed Firefox. It does not pose a problem, that I know of, but it does concern me because I always have to End Program manually when I get this message.
    == Over a year ago.

    Can you attach a screenshot?
    *http://en.wikipedia.org/wiki/Screenshot
    *https://support.mozilla.org/kb/how-do-i-create-screenshot-my-problem
    Use a compressed image type like PNG or JPG to save the screenshot.
    Reload web page(s) and bypass the cache to refresh possibly outdated or corrupted files.
    *Press and hold Shift and left-click the Reload button.
    *Press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
    *Press "Command + Shift + R" (MAC)
    Clear the cache and the cookies from sites that cause problems.
    "Clear the Cache":
    *Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"
    "Remove Cookies" from sites causing problems:
    *Firefox/Tools > Options > Privacy > Cookies: "Show Cookies"
    SeaMonkey

  • Iget this when I try to open a session....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.task mngr shows no open firefox processes.

    I get this when I try to open a session....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.The task manager shows no open Firefox processes.I had two users on this laptop running Firefox and I tried deleting the program on both users. I then downloaded the newest version, installed it and I still get the error message as before. HELP!!!! I loved the browser program when it was working before and would rather use it than other browsers.

    See "Hang at exit":
    * http://kb.mozillazine.org/Firefox_hangs
    * https://support.mozilla.com/kb/Firefox+hangs

  • Programs Not Responding

    I run an iMac, 2008, 2.66 Intel Core Duo Proc, 4 GB memory. I started having issues with the programs not responding and the internet slow. It was generally after 10 PM. The daytime seemed fine. I then installed Yosemite. It seems worse. I then purchased Clean My Mac and have cleaned it about 3 times. Now the problems are even in the afternoon. It affects my Microsoft for Mac programs, QuickBooks, iTunes, iPhoto, as well as the internet. I ran a systems report on the software log and  things look suspicious. My neighbor has been hacked by someone in the neighborhood. I am wondering if I have. Or do I have a virus. Are these symptoms characteristic of a specific problem you know about?  I also have a MacBook Pro with the same issues.

    This is the report. Can you advise me further?
    EtreCheck version: 2.1.8 (121)
    Report generated April 7, 2015 at 4:51:25 PM CDT
    Download EtreCheck from http://etresoft.com/etrecheck
    Click the [Click for support] links for help with non-Apple products.
    Click the [Click for details] links for more information about that line.
    Hardware Information: ℹ️
        iMac (20-inch, Early 2008) (Verified)
        iMac - model: iMac8,1
        1 2.66 GHz Intel Core 2 Duo CPU: 2-core
        4 GB RAM Upgradeable
            BANK 0/DIMM0
                2 GB DDR2 SDRAM 800 MHz ok
            BANK 1/DIMM1
                2 GB DDR2 SDRAM 800 MHz ok
        Bluetooth: Old - Handoff/Airdrop2 not supported
        Wireless:  en1: 802.11 a/b/g/n
    Video Information: ℹ️
        ATI Radeon HD 2600 Pro - VRAM: 256 MB
            iMac 1024 x 768
    System Software: ℹ️
        OS X 10.10.2 (14C109) - Time since boot: 6 days 18:35:49
    Disk Information: ℹ️
        Hitachi HDP725032GLA380 disk0 : (320.07 GB)
            EFI (disk0s1) <not mounted> : 210 MB
            [redacted] HD (disk0s2) / : 319.21 GB (99.94 GB free)
            Recovery HD (disk0s3) <not mounted>  [Recovery]: 650 MB
    USB Information: ℹ️
        Apple Inc. Built-in iSight
        Apple Computer, Inc. IR Receiver
        Apple Inc. BRCM2046 Hub
            Apple Inc. Bluetooth USB Host Controller
        Logitech USB Receiver
    Gatekeeper: ℹ️
        Mac App Store and identified developers
    Kernel Extensions: ℹ️
            /System/Library/Extensions
        [not loaded]    com.Belcarra.iokit.USBLAN_netpart (3.1.1 - SDK 10.6) [Click for support]
        [not loaded]    com.Belcarra.iokit.USBLAN_usbpart (3.1.1 - SDK 10.6) [Click for support]
        [loaded]    com.Logitech.Control Center.HID Driver (3.9.0 - SDK 10.6) [Click for support]
        [loaded]    com.Logitech.Unifying.HID Driver (1.3.0 - SDK 10.6) [Click for support]
        [not loaded]    com.RemoteControl.USBLAN.usbpart (3.1.1 - SDK 10.7) [Click for support]
        [not loaded]    com.kodak.printer.XXXX.kext (1.3.0) [Click for support]
            /System/Library/Extensions/2.2.0/Belcarra.USBLAN_netpart.kext/Contents/Plug-Ins
        [not loaded]    com.belcarra.iokit.netpart.panther (1.6.3) [Click for support]
            /System/Library/Extensions/2.2.0/Belcarra.USBLAN_usbpart.kext/Contents/Plug-Ins
        [not loaded]    com.belcarra.iokit.usbpart.panther (1.6.3) [Click for support]
            /System/Library/Extensions/2.2.0/RemoteControl.USBLAN_usbpart.kext/Contents/Plu g-Ins
        [not loaded]    com.RemoteControl.USBLAN.panther (1.6.2) [Click for support]
    Startup Items: ℹ️
        HP IO: Path: /Library/StartupItems/HP IO
        Startup items are obsolete in OS X Yosemite
    Problem System Launch Agents: ℹ️
        [killed]    com.apple.CallHistoryPluginHelper.plist
        [killed]    com.apple.CallHistorySyncHelper.plist
        [killed]    com.apple.cmfsyncagent.plist
        [killed]    com.apple.Maps.pushdaemon.plist
        [killed]    com.apple.telephonyutilities.callservicesd.plist
        [killed]    com.apple.warmd_agent.plist
        6 processes killed due to memory pressure
    Problem System Launch Daemons: ℹ️
        [killed]    com.apple.awdd.plist
        [killed]    com.apple.ctkd.plist
        [killed]    com.apple.emond.aslmanager.plist
        [killed]    com.apple.icloud.findmydeviced.plist
        [killed]    com.apple.ifdreader.plist
        [killed]    com.apple.nehelper.plist
        [killed]    com.apple.periodic-monthly.plist
        [killed]    com.apple.periodic-weekly.plist
        [killed]    com.apple.wdhelper.plist
        9 processes killed due to memory pressure
    Launch Agents: ℹ️
        [unknown]    entries [Click for support]
        [unknown]    format [Click for support]
        [not loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
        [running]    com.adobe.AdobeCreativeCloud.plist [Click for support]
        [running]    com.citrixonline.GoToMyPC.LaunchAgent.plist [Click for support]
        [running]    com.kodak.BonjourAgent.plist [Click for support]
        [running]    com.Logitech.Control Center.Daemon.plist [Click for support]
        [loaded]    com.oracle.java.Java-Updater.plist [Click for support]
        [unknown]    KodakAiOBonjourAgent [Click for support]
    Launch Daemons: ℹ️
        [loaded]    com.adobe.fpsaud.plist [Click for support]
        [loaded]    com.adobe.SwitchBoard.plist [Click for support]
        [running]    com.citrixonline.GoToMyPC.CommAgent.plist [Click for support]
        [loaded]    com.macpaw.CleanMyMac2.Agent.plist [Click for support]
        [loaded]    com.oracle.java.Helper-Tool.plist [Click for support]
        [loaded]    com.oracle.java.JavaUpdateHelper.plist [Click for support]
    User Launch Agents: ℹ️
        [loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
        [loaded]    com.adobe.ARM.[...].plist [Click for support]
        [loaded]    com.adobe.ARM.[...].plist [Click for support]
        [loaded]    com.adobe.ARM.[...].plist [Click for support]
        [loaded]    com.adobe.ARM.[...].plist [Click for support]
        [running]    com.amazon.cloud-player.plist [Click for support]
        [loaded]    com.google.keystone.agent.plist [Click for support]
        [loaded]    com.Kodak.Registration.plist [Click for support]
        [loaded]    com.macpaw.CleanMyMac2Helper.diskSpaceWatcher.plist [Click for support]
        [loaded]    com.macpaw.CleanMyMac2Helper.scheduledScan.plist [Click for support]
        [loaded]    com.macpaw.CleanMyMac2Helper.trashWatcher.plist [Click for support]
    User Login Items: ℹ️
        iPhoto    Application Hidden (/Applications/iPhoto.app)
        Mail    Application Hidden (/Applications/Mail.app)
        QuickBooks 2012    Application Hidden (/Applications/QuickBooks 2012.app)
        Dropbox    Application Hidden (/Applications/Dropbox.app)
        Contacts    Application Hidden (/Applications/Contacts.app)
        HP Scheduler    Application Hidden (/Library/Application Support/Hewlett-Packard/Software Update/HP Scheduler.app)
        HP Product Research    Application Hidden (/Library/Application Support/Hewlett-Packard/Customer Participation/HP Product Research.app)
    Internet Plug-ins: ℹ️
        Google Earth Web Plug-in: Version: 6.0 [Click for support]
        Default Browser: Version: 600 - SDK 10.10
        AdobeExManDetect: Version: AdobeExManDetect 1.1.0.0 - SDK 10.7 [Click for support]
        Flip4Mac WMV Plugin: Version: 2.3.4.1 [Click for support]
        CouponPrinter-FireFox: Version: Version 1.0.11
        AdobeAAMDetect: Version: AdobeAAMDetect 2.0.0.0 - SDK 10.7 [Click for support]
        AdobePDFViewerNPAPI: Version: 10.1.13 [Click for support]
        FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]
        OfficeLiveBrowserPlugin: Version: 12.3.6 [Click for support]
        Flash Player: Version: 16.0.0.305 - SDK 10.6 Outdated! Update
        iPhotoPhotocast: Version: 7.0 - SDK 10.8
        QuickTime Plugin: Version: 7.7.3
        Silverlight: Version: 5.1.30514.0 - SDK 10.6 [Click for support]
        AdobePDFViewer: Version: 10.1.13 [Click for support]
        Unity Web Player: Version: UnityPlayer version 3.1.0f4 [Click for support]
        JavaAppletPlugin: Version: Java 7 Update 75 Check version
    User internet Plug-ins: ℹ️
        Picasa: Version: 1.0 - SDK 10.6 [Click for support]
    3rd Party Preference Panes: ℹ️
        EarthDesk  [Click for support]
        Flash Player  [Click for support]
        Flip4Mac WMV  [Click for support]
        GoToMyPC Preferences  [Click for support]
        Java  [Click for support]
        Logitech Control Center  [Click for support]
    Time Machine: ℹ️
        Skip System Files: NO
        Mobile backups: OFF
        Auto backup: NO - Auto backup turned off
        Volumes being backed up:
            Macintosh HD: Disk size: 319.21 GB Disk used: 219.28 GB
        Destinations:
            Data [Network]
            Total size: 0 B
            Total number of backups: 0
            Oldest backup: -
            Last backup: -
            Size of backup disk: Too small
                Backup size 0 B < (Disk used 219.28 GB X 3)
    Top Processes by CPU: ℹ️
             4%    com.hp.devicemonitor
             3%    WindowServer
             0%    Creative Cloud
             0%    AdobeReader
             0%    firefox
    Top Processes by Memory: ℹ️
        1.00 GB    com.hp.devicemonitor
        236 MB    firefox
        64 MB    Skype
        56 MB    Finder
        43 MB    Mail
    Virtual Memory Information: ℹ️
        61 MB    Free RAM
        967 MB    Active RAM
        923 MB    Inactive RAM
        1.36 GB    Wired RAM
        71.10 GB    Page-ins
        3.58 GB    Page-outs
    Diagnostics Information: ℹ️
        Apr 7, 2015, 01:47:58 PM    /Library/Logs/DiagnosticReports/QuickBooks 2012_2015-04-07-134758_[redacted].hang
        Apr 7, 2015, 01:30:31 PM    /Library/Logs/DiagnosticReports/QuickBooks 2012_2015-04-07-133031_[redacted].hang
        Apr 7, 2015, 12:20:08 PM    /Library/Logs/DiagnosticReports/QuickBooks 2012_2015-04-07-122008_[redacted].hang
        Apr 7, 2015, 09:51:02 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/LCCDaemon_2015-04-07-095102_[r edacted].crash
        Apr 7, 2015, 02:10:49 AM    /Library/Logs/DiagnosticReports/firefox_2015-04-07-021049_[redacted].cpu_resour ce.diag [Click for details]
        Apr 6, 2015, 11:59:55 AM    /Library/Logs/DiagnosticReports/firefox_2015-04-06-115955_[redacted].hang
        Apr 6, 2015, 11:58:15 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-04-06-11 5815_[redacted].crash
        Apr 4, 2015, 11:14:21 PM    /Library/Logs/DiagnosticReports/Microsoft Word_2015-04-04-231421_[redacted].hang
        Apr 4, 2015, 11:07:23 PM    /Library/Logs/DiagnosticReports/Microsoft Word_2015-04-04-230723_[redacted].cpu_resource.diag [Click for details]
        Apr 4, 2015, 10:39:44 PM    /Library/Logs/DiagnosticReports/Microsoft Word_2015-04-04-223944_[redacted].hang
        Apr 4, 2015, 10:39:43 PM    /Library/Logs/DiagnosticReports/Microsoft Word_2015-04-04-223943_[redacted].hang
        Apr 4, 2015, 10:27:08 PM    /Library/Logs/DiagnosticReports/Microsoft Word_2015-04-04-222708_[redacted].cpu_resource.diag [Click for details]
        Apr 4, 2015, 05:18:54 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/plugin-container_2015-04-04-17 1854_[redacted].crash

  • I close firefox and try to open it again later, it WON'T and says, "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." Firefox isn't running .

    After I turn on my laptop and click on firefox it works fine and it opens THE FIRST TIME. So can you help? i DON'T WANT TO RESTaRT my computer everytime and sometimes have to clsoe firefox b/c I'm typing paper and computer goes slow.

    Sounds like a "hang at exit" problem. There are several possible causes for that error. See:
    * How to stop the running Firefox process
    ** In Task Manager, does firefox.exe show in the '''<u>Processes</u>''' tab?
    ** See: http://kb.mozillazine.org/Kill_application
    * What may cause Firefox to hang at exit
    ** http://support.mozilla.com/en-US/kb/Firefox+hangs (see "Hang at exit" section)
    ** http://kb.mozillazine.org/Firefox_hangs
    ** https://support.mozilla.com/en-US/kb/Firefox+is+already+running+but+is+not+responding
    * You may need to try Firefox Safe Mode
    ** You may need to use '''Safe Mode''' to locate the problem: http://support.mozilla.com/en-US/kb/Safe+Mode
    **Firefox Safe Mode 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 '''<u>before</u>''' 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.
    ** If the problem does not occur in Safe-mode then disable all of your Extensions and Plug-ins and then try to find which is causing it by enabling '''<u>one at a time</u>''' until the problem reappears. '''<u>You MUST close and restart Firefox after EACH change</u>''' via File > Restart Firefox (on Mac: Firefox > Quit). You can use "Disable all add-ons" on the Safe mode start window.
    ** See the following for more information
    *** http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes
    *** http://support.mozilla.com/en-US/kb/Troubleshooting+plugins
    *** http://support.mozilla.com/en-US/kb/Basic+Troubleshooting

  • Firefox is OPEN and working fine, but when I click a link in Thunderbird I get '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.'

    If I click a link on my desktop or in any other program (while Firefox is open and running), I get this message: "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." There's about a billion links for this if you Google it, but they all say that Firefox wasn't shut down properly. (OK, maybe not ALL of them, but if the needle is in that haystack, I haven't yet found it.) That's not the issue in my case since I haven't shut FF down at all.
    == This happened ==
    Every time Firefox opened
    == IDK

    This began to happen to me when I tried to run two separate profiles simultaneously on the same installation of firefox with -no-remote

  • When I try to open firefox it says that it is not responding, after I disabled the adobe flash plug-in it worked, how do I get it to work with flash

    Since I updated my adobe flash player firefox keeps saying that it is not responding after I open it and it loads my home page, I disabled add-ons and went throught the process of figuring out which one it was and it was adobe flash, but without flash I cant access a lot of different sites, how can I fix this. I have tried uninstalling and reinstalling both firefox and adobe flash, but neither works!

    See "Hang at exit":
    * http://kb.mozillazine.org/Firefox_hangs
    * [[Firefox hangs]]

  • When I try to access Firefox I get this message: "Firefox is already running, but is not responding. To open a new windwo, you must first close the existing Firefox process, or restart your computer."

    When I click on Firefox I get a window that says: "Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your computer." I can't see where anything is running on firefox. I restarted the comuter and I shut down the computer. I also ran a full scan of the computer.

    Sorry I am a PC user but have you seen
    * [[Firefox is already running but is not responding]]
    Firefox will be hanging for some reason. The quick solutions to kill the process and try again. The next step is to try to see if it will start and exit normally a couple of times, if so the problem is solved. If not the reason needs further investigation.
    See [[firefox hangs]]
    An immediate likely culprit after repeated problems are the duplicate session restore files, as discussed in the above KB article.

  • When I try to start Firefox I get 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 get this message when I try to start Firefox after first logging on after turning on the computer.
    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.
    Have rebooted. Works when Administrator logs in, just does this in my user profile. Have also re-intalled. Mo change in my User account.
    Firefox was working fine for the last 3 1/2 years. Any suggestions?

    Firefox is "hanging at exit" when you exit/quit Firefox.<br /><br />
    #Stop the Firefox process:
    #*[http://kb.mozillazine.org/Kill_application Mozillazine - Kill application]
    #*Windows 7 users click [http://www.techrepublic.com/blog/window-on-windows/reap-the-benefits-of-windows-7s-task-manager/2576 here]
    #*Mac users: http://techheavy.com/2011/02/the-mac-task-manager/
    #Why Firefox may hang:
    #*[http://support.mozilla.com/en-US/kb/Firefox+hangs Firefox hangs] (see Hang at exit)
    #*[http://kb.mozillazine.org/Firefox_hangs Firefox hangs (Mozillazine)] (see Hang at exit and Closing Firefox properly)
    #*[https://support.mozilla.com/en-US/kb/Firefox+is+already+running+but+is+not+responding Firefox is already running but is not responding]
    #Use Firefox Safe Mode to find a problem with an Extension or Plugin:
    #*Don't check anything when entering Safe Mode, just continue
    #*If the problem does not occur in Safe Mode it is probably and Extension or Plugin causing the problem
    #*See:
    #**[[Safe Mode]] and [http://kb.mozillazine.org/Safe_Mode Safe Mode (Mozillazine)]
    #**[http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes Troubleshooting extensions and themes]
    #**[http://support.mozilla.com/en-US/kb/Troubleshooting+plugins Troubleshooting plugins]
    #**[http://support.mozilla.com/en-US/kb/Basic+Troubleshooting Basic Troubleshooting]
    '''If this reply solves your problem, please click "Solved It" next to this reply when <u>signed-in</u> to the forum.'''

  • I getthe message 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. It is NOT open I onlly have one computer

    I installed FF on my new computer, Windows 7 Toshiba, I get the message''' 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'''. It is NOT open I only have one computer.
    I had a computer expert try everything and we cannot get it to open.

    Look for the firefox process firefox.exe and kill it with for instance task manager. it is also worth watching for plugincontainer.exe.
    The problem and solutions are explained in the articles:
    * [[firefox is already running but is not responding]]
    *[[firefox hangs]]

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