Why does firefox continue to run after closing it?

I close out of an internet site and then go to another link and I get the box that says "Firefox is still running," I wait and try again and it still tells me this.I try several times,I then reboot and start over.How do I stop this?

Probably a problematic extension can cause the problem, see : [https://support.mozilla.org/en-US/kb/Firefox-hangs#w_firefox-hangs-when-you-quit-it Firefox hangs when you quit it]
thank you
Please mark "Solved" the answer that really solve the problem, to help others with a similar problem.

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Why is Firefox continuing to run after I shut down the internet connection?

I am having a problem with Firefox not shutting down. I shut down the internet, then go back on later and I get an error message that Firefox is already running and that I will need to reboot my system to clear the problem. I am running Firefox 3.6.17 on Windows Xp with sp3. I tried running Firefox 4.0 and it just did not run at all so I went back to the previous version.

Hanging at exit is usually caused by and Extension or Plugin.
Sounds like it is hanging when you exit and later try to restart Firefox.
* How to stop the running Firefox process
** In Task Manager, does firefox.exe show in the '''Processes''' tab?
** See: http://kb.mozillazine.org/Kill_application
**Windows 7 users: http://www.techrepublic.com/blog/window-on-windows/reap-the-benefits-of-windows-7s-task-manager/2576
* What may cause Firefox to hang at exit
** http://support.mozilla.com/en-US/kb/Firefox+hangs
** 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:
***See:
****https://support.mozilla.com/en-US/kb/Safe%20Mode
****http://kb.mozillazine.org/Safe_Mode
***Firefox 4 users, hold the Shift key while clicking the Firefox 4 desktop icon to enter Safe Mode.
***Firefox Safe Mode is a diagnostic mode that disables Extensions and some other features of Firefox.
****In Firefox 4, Safe Mode also disables Plugins and Hardware Acceleration.
****If you are using a theme, switch to the DEFAULT theme: Tools > Add-ons > Themes '''before''' starting Safe Mode (In Firefox 4, Tools > Add-ons > Appearance). See: http://support.mozilla.com/en-US/kb/Using%20themes%20with%20Firefox#w_managing-themes-and-personas
****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 '''one at a time''' until the problem reappears.
***#You can also enable a few at a time (3-5), keeping track of what you just re-enabled to see if the problem re-occurs; this will help narrow down the possibilities if you have a large number of add-ons.
***#'''You MUST 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.
**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
 
 
'''You need to update the following.''' The Plugin version(s) shown below was/were submitted with your question and is/are out of date. You should update to avoid known security issues with the version(s) you have installed. Click on "More system info..." to the right of your question to see what was included with your question.
*Next Generation Java Plug-in 1.6.0_24 for Mozilla browsers
#'''''Check your plugin versions''''' on either of the following links':
#*http://www.mozilla.com/en-US/plugincheck/
#*https://www-trunk.stage.mozilla.com/en-US/plugincheck/
#*'''Note: plugin check page does not have information on all plugin versions'''
#*There are plugin specific testing links available from this page:
#**http://kb.mozillazine.org/Testing_plugins
#'''Update the [[Java]] plugin''' to the latest version.
#*Download site: http://www.oracle.com/technetwork/java/javase/downloads/index.html (Java Platform: Download JRE)
#**'''''Be sure to un-check the Yahoo Toolbar option during the install if you do not want it installed.
#*Also see "Manual Update" in this article to update from the Java Control Panel in Windows Control Panel: http://support.mozilla.com/en-US/kb/Using+the+Java+plugin+with+Firefox#Updates
#* Removing old versions (if needed): http://www.java.com/en/download/faq/remove_olderversions.xml
#* Remove multiple Java Console extensions (if needed): http://kb.mozillazine.org/Firefox_:_FAQs_:_Install_Java#Multiple_Java_Console_extensions
#*Java Test: http://www.java.com/en/download/help/testvm.xml

Firefox process occasionally continues to run after closing browser in XP Pro 64 and uses 50% CPU

Every once in awhile after closing Firefox 3.6.13 the process continues to run. The way I discover this is my CPU temperature monitor is increasing from 36C to 50C, so I open the Task Manger and see that it is using 50% of the CPU, slowing down the computer. I am running XP Professional 64 bit SP2 with all the latest updates on an Intel E8400 3.0GHz overclocked to 3.6GHz and 4GB dual channel DDR2-1066 at 800MHz. This happens only occasionally, maybe once or twice a month. I just end the task and the temperature of the CPU drops and everything is normal again.

Norton IPS is apparently a known issue being mentioned in the KB articles:
*[[firefox will not start]]
* [[firefox crashes when you open it]]
* I also found an earlier post on the Norton site http://community.norton.com/t5/Norton-Internet-Security-Norton/Norton-IPS-1-0-Addon-for-FireFox/m-p/25425#M8494 but I am not sure this is still considered a problem.
What exactly is this IPS extension. I am currently using XPs with Norton's NIS (version 18.6 - it is a paid for subscription). I do have Intrusion Prevention active in NIS but I see no specific extension or program IPS. Is this some optional additional software?
I did find an explanation but from 2009
* http://community.norton.com/t5/Norton-Protection-Blog/Intrusion-Prevention-System-IPS-Your-first-line-of-defense/ba-p/124400
I am NOT using the Norton Toolbar etc. is it these components that are causing the problem i.e safe search etc.
I am not having problems with firefox hanging or continuing, despite using NIS.
There is a bug on this https://bugzilla.mozilla.org/show_bug.cgi?id=548945 but that does not seem to have got very far in confirming or resolving the issue. I imagine Norton have a very large userbase and it seems unlikely that the basic NIS is itself incompatible with Firefox.

Firefox exe continues to run after closing all windows, and consumes massive amounts of cpu

after closing all firefox windows and trying to reopen i get the "firefox is still running but unresponsive" message, and have to go into task manager, processes and end the firefox exe, which is consuming between 96 and 100 cpu.

Norton IPS is apparently a known issue being mentioned in the KB articles:
*[[firefox will not start]]
* [[firefox crashes when you open it]]
* I also found an earlier post on the Norton site http://community.norton.com/t5/Norton-Internet-Security-Norton/Norton-IPS-1-0-Addon-for-FireFox/m-p/25425#M8494 but I am not sure this is still considered a problem.
What exactly is this IPS extension. I am currently using XPs with Norton's NIS (version 18.6 - it is a paid for subscription). I do have Intrusion Prevention active in NIS but I see no specific extension or program IPS. Is this some optional additional software?
I did find an explanation but from 2009
* http://community.norton.com/t5/Norton-Protection-Blog/Intrusion-Prevention-System-IPS-Your-first-line-of-defense/ba-p/124400
I am NOT using the Norton Toolbar etc. is it these components that are causing the problem i.e safe search etc.
I am not having problems with firefox hanging or continuing, despite using NIS.
There is a bug on this https://bugzilla.mozilla.org/show_bug.cgi?id=548945 but that does not seem to have got very far in confirming or resolving the issue. I imagine Norton have a very large userbase and it seems unlikely that the basic NIS is itself incompatible with Firefox.

Why does Firefox continue to crash?

Can someone please suggest why Firefox continues to crash when attempting to download a file. It happens every time, without fail.
* I have deleted the downloads.sqlite file (more than once) to no effect.
* I have disabled AVG firewall etc - to no effect.
* Firefox originally crashed on the latest version, so I downgraded to v5.0.1 - to no effect. I have checked using AVG and an online virus/spyware checker and can find no infection.
* I have submitted 17 crash reports since 29 September, but when I right click on any of them, and try to open in a new tab, I receive the following messge: “We couldn't find the OOID you're after. If you recently submitted this crash, it may still be in the queue.”
My OS is Vista Business 32 bit. Thank you for any help & advice.

(For the record, from "More system details")
Crash ID
See below please 
More Information
Here is a list of 'not received' crash reports:
Report ID --------------------------------------------- Date Submitted
bp-ff03aa8a-e680-4821-b260-864932111012 13/10/2011 12:31 a.m.
bp-44dead09-627a-449e-ac48-5a18a2111012 13/10/2011 12:30 a.m.
bp-bc42e81f-b31e-48fd-bd1b-6dad22111012 13/10/2011 12:26 a.m.
bp-5feaf006-257e-4fc3-9df5-9b8792111012 13/10/2011 12:24 a.m.
bp-84325d98-4938-4ed2-b574-ca6b12111012 13/10/2011 12:22 a.m.
bp-ef70207e-8a15-4c35-b763-7eb4b2111012 12/10/2011 11:55 p.m.
bp-20b38fa4-dbf6-4dd7-bff9-aee782111011 12/10/2011 12:03 a.m.
bp-63568c58-0826-4839-9839-b35512111010 11/10/2011 11:36 a.m.
bp-054a8e03-070b-479c-a6d0-9cd292111005 6/10/2011 5:42 p.m.
bp-32b490c5-1c99-486e-961b-6d1fa2111003 4/10/2011 6:50 p.m.
285f5b2f-121c-4303-aa7a-594af8461227 3/10/2011 12:27 p.m.
bp-beeb682a-5c13-4dbf-82f4-5cdfe2111001 2/10/2011 4:49 p.m.
bp-65965bd2-f6c1-488e-8cde-657802110929 30/09/2011 12:51 p.m.
bp-40b59c9f-5450-48c6-aec6-8f96e2110929 30/09/2011 12:37 p.m.
bp-140e8655-c044-47d9-a177-557bb2110929 30/09/2011 12:37 p.m.
092324db-f7ae-4e78-9280-801dd7a2b356 29/09/2011 12:12 p.m.
bp-e1a02380-6dbb-4bb0-9883-453d72110928 29/09/2011 12:12 p.m.
P.S. all of the available crash reports I checked show:
Signature: rapporttanzan5.dll@0x614c
More info, from http://kb.mozillazine.org/Firefox_crashes#Trusteer_Rapport
[http://www.trusteer.com/product Trusteer Rapport] (an application promoted by some banks for malware protection) may cause Firefox to crash. If you use this software, try disabling it. If that stops the crashes, try updating the software to the latest verion, uninstall the program if you don't need it, or contact [http://consumers.trusteer.com/report-problem Trusteer Support].

Why does Firefox require a reboot after uninstallation?

Basically, my problem was already asked here: https://support.mozilla.org/en-US/questions/916857
But that thread is marked as "solved", when in fact this problem is nowhere near being solved, so I am asking it again in a new, "unsolved" thread.
In former times Firefox never needed a reboot, and it does not make any sense because no Firefox-related file should be in use at the time of uninstallation. (Forget about updating in my case; I am doing a clean uninstall, and Firefox insists in rebooting anyway.)
Windows reboots due to software uninstallations are generally only required in the following cases:
* If files that belong to Windows are being modified. I hope Firefox does no such thing...
* Part of the software being uninstalled is still running, so that its files are in use. However, I completely closed Firefox and even used the task manager to make sure no firefox-related processes were running.
Some applications (i.e. Adobe Reader) install fancy "Speed Launchers" that are loaded at boot time and stay resident in memory. Unless these processes are manually killed before uninstallation, they may also be the reason why a reboot is necessary. However, Firefox should not do such a thing.
To summarize it, the question is: '''Which part of Firefox is running during uninstallation so that removal of the corresponding files is required?
Generally, I consider this a very bad software behavior, one that I would expect from some commercial software producer who wants to install his speedlaunch or logging stuff on my computer, but not from a free project like this one.
Firefox Portable does not do this, easily proving that technically it is not necessary. Earlier versions of Firefox also refrained from doing such a thing.
A piece of software requesting a reboot without good reason is what I consider a bug.

Aw, c'mon. Writing to the Windows registry never requires a reboot. This is ridiculous.
And Firefox did not need that bad behavior up to version 8 either. Why now?
This is not a Windows issue. You cannot alter files in Linux either if they are currently locked. The thing is that there is no sensible reason for any Firefox-related files to be locked at uninstallation time, which is why there should be no problem removing them.
I do not mean to rant, even though I am disappointed by this new behavior and would like to have it changed, but the least thing I really would like to know is exactly what is causing this. Why have the new versions of Firefox been programmed to require a reboot? Exactly which files need to be removed or changed that cannot be removed/changed during regular uninstallation, so that their removal/change needs to be scheduled for the next restart of Windows?

Why does Firefox continually close itself without warning, but reopen prior tabs, without an error message or crash report?

For the past couple weeks Firefox has been randomly closing itself, without warning. I will be on another program on my laptop and Firefox will shut down. But, when I reopen it, all my tabs will restore as if nothing happened, and there is rarely a recovery error alert. I also do not receive crash reports for this phenomenon. Everything about the browser seems to be working fine as usual otherwise.

I'm sorry but I think you didn't get the problem right. Firefox just unexpectedly closes. It does not crash. There are no crash reports.

Why does Firefox continue to state that the Java Deployment Toolkit is known to be vulnerable.

The original issue with Java has been fixed yet FF continues to state the same warning which must be confusing at least and a road block for others at worst?
There's a thread
https://bugzilla.mozilla.org/show_bug.cgi?id=636633
that 'discusses' this and the person Anthony Hughes, QA Mentor (:ashughes)
has said that the issue should be posted here (don't know why he wouldn't do that himself, seems very unhelpful as a 'Mentor').
So, I'm posting a question, which is really a request that the Devs remove this warning.
It has nothing to do with my OS and also doesn't need me to Allow you to install something to gather information, just install Java and check the Plugins...

Obviously the responder didn't check anything assuming that the responder had Java installed.
If Java was NOT installed on the responders system, then the responder didn't bother to check 'what you get' when running FF in Safe Mode....
When running FF in Safe Mode you get NOTHING in the menu bar and therefore you can't check Addons>Plugins to see if the warning exists.
If the responder had read the thread in Bugzilla@Mozilla the responder would have seen that the warning was added by the FF Support Team, not an Addon.
I suggest that someone read the other thread, possibly contact 'Hughes', install Java and actually look at the problem rather than providing useless answers to valid questions.
And the little checkbox indicating that I'm providing the requested information has been left as 'ticked' because the above response fits that criteria - Was this Useful? - No it wasn't.

Why does Firefox performance slow down after starting Jack server?

Hello,
I started configuring my audio on my system. So, I want to have jack working (not jack2, to work with wineasio) with best sound quality with all sound routed through jack. When i start jack server with this command and settings:
killall jackd;killall pulseaudio;jackd -R -t 1000 -d alsa -P hw:0,0 -r 48000 -n2 -D
Firefox slows down, opens new pages slow and the scroll down is very very slow. I had this issue with other distros too. I suspect that it has to do with realtime ( which i need for my audio related apps like traktor through wine, ardour, ableton through wine etc) without being sure about it. Any idea why this is happening?

zabrielza wrote:I had this issue with other distros too.
This smells like hardware problem. Do this:
1. Kill pulseaudio, jack, and make sure they are killed
2. Make sure you do not renice anything or apply other such tweaks
3. Run jackd -d alsa
4. Use your system
5. If unsatisfactory, try jackd -d alsa -p 1024 -n 3
6. Use your system
Jack runs with realtime priority by default (no flag required), and we still use the audio group to provide that privilege. I also do not advocate the realtime kernel, but you may try it. Jack not functioning well (i.e. hampering other tasks significantly) on a standard kernel is cause for concern.
You can read/grep your dmesg and systemd journal for suspicious messages. You may try running real-time audio tasks in another operating system with your hardware, and upon success may proceed to debug the problem on Linux, possibly with the help of the alsa developers.
Or better yet, grab a supported semi-pro external audio device if jack is important for you. However, this may not help if the problem is somewhere deeper, e.g. at the hardware interrupt level.
Last edited by schivmeister (2015-04-30 18:21:56)

Why does Firefox 8 close unexpectedly after I print a webpage?

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Thanks. I have just restarted Firefox in safe mode and printed a webpage without Firefox closing. Will this affect any other use of Firefox?

Firefox process keeps running after closing

If i close Firefox i cannot reopen it afterwards because the process is still running in the taskbar.
I already disabled all plugins and addons but this didn't work.
I tried to uninstall and reinstall (without deleting personal data) without success.
If i start firefox in safe mode the problem also occures.
If i start firefox with another user on my pc there is no problem.
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See "Hang at exit":
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* [[Firefox hangs]]

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Also blocks site when a site redirects to another site.

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* [[Options window - Advanced panel#General_tab]]
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Why does Firefox spring open, even after I quit, because I have cleared notifications or opened a file I downloaded. I have double checked Firefox is NOT set to open images or videos automatically, es

ES File Manager is my default player for almost all media. Firefox is not set to default.
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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

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please update your version of the flash plugin & see if that works:
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Why does firefox continue to run after closing it?

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