Firefox won't close after checking plugins

I do a plugins check B4 I close Firefox, then I always run CCleaner after that, but lately CCleaner has been telling me that I still have a browser open and asks if I want it to close Firefox, if I tell it "yes" then it says it is taking too long do I want it to force Firefox to close! I have not changed anything, upgraded, or uninstalled anything. I am running the latest version of Firefox (not Beta) it is the only browser I use. I run Windows XPPro, and work on a IBM ThinkPad T42p.

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

Similar Messages

Firefox won't open after checking for add-on updates

Hi
i am having problems with Add-ons checking for updates.
The first problem is that in add-on manager, even though i have it set to automatically update add-ons, it has no history of finding any and it's failure to find a new version of a plug-in meant pdfs weren't opening see full details here ... https://support.mozilla.com/en-US/questions/829011
The problem i am now having is that when i manually check for updates in Add-Ons manager, it pauses for a few seconds, and completes it's task by saying it hasn't found anything. If i then close Firefox, i can't open Firefox again until i go into task manager and kill the process. It says it's already running and i have to close it first?!

can't believe that i was the only person to have the problem, but no replies whatsoever suggest i was. have now upgraded to 5.0 where the problem has not yet reoccurred.

Firefox won't start after an update. Firefox help says check virtualization settings. What is virtualization settings and where do you check them and for what? I have Windows XP

Firefox won't start after downloading update. I've reinstalled Firefox, still won't start. Help says check virtualization settings. What and where are virtualization settings? I have Windows XP.

This might be Zone Alarm since it provides virtualization. Please try the instructions to turn off virtualization in the following support question
http://support.mozilla.com/en-US/questions/880170

Firefox won't start after update - nothing in support pages helps

windows 7 - firefox won't start after update - no support pages are relevant

-> [[Firefox will not start]]
Check and tell if its working.

Firefox won't start after google chrome imported all data(bookmarks,passwords,history,etc) from firefox

firefox won't start after i import the data to google chrome.

Start Firefox in <u>[[Safe Mode]]</u> to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
*Don't make any changes on the Safe mode start window.
*https://support.mozilla.com/kb/Safe+Mode
See also:
*http://kb.mozillazine.org/Browser_will_not_start_up

Firefox won't close without using Task Manager - end process; can't start in safe mode or disable add-ons

I've been having a memory leak/hanging problem for weeks -- FF slowly increases memory usage until it's at almost 100% and then freezes and I have to shut it down via Task Manager/end process.
Last week I updated to FF 12, and I also added the Web Developer 1.1.9 add-on. Now every time I open Firefox it tries to go to the "Web Developer installed" page, but the page never loads. Nothing else will load either.
I can't start in Safe Mode because of the problem with having to close it in Task Manager. I select "restart with add-ons disabled" and it just never opens. The Add-On manager page won't load, so I can't disable Web Developer to see if that's the problem.
I've uninstalled Firefox and reinstalled, and it still goes right back to the Web Developer page when I open the freshly installed copy.
Help, please!

Have you already tried clearing the browser cache, opening a blank tab, and trying to open some other website ?
* [[how to clear the cache]]
Instead of trying to open safe mode from within the User Interface menu have you tried alternative methods such as holding the shift key when you start Firefox. (After checking for running Firefox processes or plugincontainer and killing them if found )
* see [[safe mode]]
* [[firefox hangs]]
If using safemode does not help first of all try creating and using a new profile.
* [[Basic Troubleshooting#w_8-make-a-new-profile]]_8-make-a-new-profile
If all the above fail then try a clean re-install of Firefox
* [[Basic Troubleshooting#w_7-reinstall-firefox]]_7-reinstall-firefox

I have a problem closing tabs in Firefox v3.6.13. The first tab on the left hand side (ie the page that opens when I launch Firefox) won't close when I click on the red x.

I can't close the left hand tab except by exiting firefox. When i launch firefox the original tab stays open when I click on the red x, even if I have other tabs open.
i can alter the website displayed on the left hand tab but it still won't close and leave other more recent tabs open.

Start Firefox in [[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:
* [[Troubleshooting extensions and themes]]

Firefox won't close/ flashplayer won't download to desktop -- getting dizzy!

Found a solution to this problem, I hope, July 22,09 note from "eagleberry" firefox user, but I can not download flashplayer to desktop:
"use firefox to download the flash player setup fromfrom here to get the NPAPI version of flash, save it to your desktop (htt;://get.adobe.com/flashplayer/)
then close firefox using file - Exit, then check the Task Mngr-processes tab to make sure all firefox applications/uses are closed (XP: Ctrl-Alt-Del, Vista: shift-Ctrl-ESC- processes tab)
then run the Flash setup file from your desktop"
does this work? help with desktop download. . . thanks

See if this happen in [https://support.mozilla.org/en-US/kb/Safe%20Mode Safe-mode] , if this is not happen then disable all extensions and then try to find which is causing it by enabling one at a time until the problem reappears.
Use "Disable all add-ons" on the Safe Mode start window to disable all extensions.
Close and restart Firefox after each change from File > Exit
[https://support.mozilla.org/en-US/kb/Troubleshooting-extensions-themes?redirectlocale=en-US&redirectslug=Troubleshooting+extensions+and+themes
Troubleshooting extensions and themes]
see also: [https://support.mozilla.org/en-US/kb/Firefox-hangs Firefox hangs]
thank you
Please mark "Solved" the answer that really solve the problem, to help others with a similar problem.

Want to revert to default settings - firefox won't close tabs on closing

Latest version of Firefox doesn't close tabs on closure after attempting to set up new tab groups. Now it won't show Facebook correctly. FB account works but not on this system.

You restore default setting through the Firefox SafeMode. <br />
http://support.mozilla.com/en-US/kb/Safe+Mode
Use - '''''Reset all user preferences to Firefox defaults'''''.

Firefox won't start after windows update

After windows Updated my computer Firefox won't start. I tried a clean reinstall two times, won't work. When I tried to start the firefox the first time after booting my computer it comes with the following message.
XML Parsing Error: undefined entity
Location: chrome://mozapps/content/extensions/update.xul
Line Number 14, Column 1:
<wizard id="updateWizard"
^
Any Help would be greatly appreciated. I like firefox and I'm using it the last 7 Years.
Thanks
DK

I cheated a little bit and put the issue url in a working version of firefox:
chrome://mozapps/content/extensions/update.xul
What I got was a page that looked like this below and console:
blah blah parser:
<pre><nowiki> xml-stylesheet
xml-stylesheet
<wizard id="updateWizard" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" title="Firefox Update" windowtype="Addons:Compatibility" branded="true" onload="gUpdateWizard.init();" onwizardfinish="gUpdateWizard.onWizardFinish();" onwizardcancel="return gUpdateWizard.onWizardCancel();" onclose="return gUpdateWizard.onWizardClose(event);" buttons="accept,cancel" pagestep="1" currentpageid="dummy" firstpage="true" lastpage="true">
<script type="application/javascript" src="chrome://mozapps/content/extensions/update.js"></script>
<stringbundleset id="updateSet">
<stringbundle id="brandStrings" src="chrome://branding/locale/brand.properties"></stringbundle>
<stringbundle id="updateStrings" src="chrome://mozapps/locale/extensions/update.properties"></stringbundle>
</stringbundleset>
<wizardpage id="dummy" pageid="dummy"></wizardpage>
<wizardpage id="offline" pageid="offline" next="versioninfo" label="Firefox is working offline" onpageadvanced="return gOfflinePage.onPageAdvanced();">
<description></description>
<checkbox id="toggleOffline" checked="true" label="Go online now." accesskey="G" oncommand="gOfflinePage.toggleOffline();"></checkbox>
</wizardpage>
<wizardpage id="versioninfo" pageid="versioninfo" next="mismatch" label="Checking Compatibility of Add-ons" onpageshow="gVersionInfoPage.onPageShow();">
<label>
Checking your add-ons for compatibility with this
</label>
<separator class="thin"></separator>
<progressmeter id="versioninfo.progress" mode="undetermined"></progressmeter>
<hbox align="center">
<image id="versioninfo.throbber" class="throbber"></image>
<label id="versioninfo.status" flex="1" crop="right"></label>
</hbox>
<separator></separator>
</wizardpage>
<wizardpage id="mismatch" pageid="mismatch" next="checking" label="Incompatible Add-ons" onpageshow="gMismatchPage.onPageShow();">
<label></label>
<separator class="thin"></separator>
<listbox id="mismatch.incompatible" flex="1"></listbox>
<separator class="thin"></separator>
<label>
Firefox can check if there are compatible versions…
</label>
</wizardpage>
<wizardpage id="checking" pageid="checking" next="noupdates" label="Checking for Compatible Add-ons" onpageshow="gUpdatePage.onPageShow();">
<label></label>
<separator class="thin"></separator>
<progressmeter id="checking.progress"></progressmeter>
<hbox align="center"></hbox>
</wizardpage>
<wizardpage id="noupdates" pageid="noupdates" label="No Compatible Add-ons Found" onpageshow="gNoUpdatesPage.onPageShow();">
<description></description>
<separator class="thin"></separator>
<hbox id="updateCheckErrorNotFound" class="alertBox" hidden="true" align="top"></hbox>
<separator class="thin"></separator>
<description id="noupdatesCheckEnabled" hidden="true"></description>
<vbox id="noupdatesCheckDisabled" hidden="true"></vbox>
<separator flex="1"></separator>
<label></label>
<separator class="thin"></separator>
</wizardpage>
</nowiki></pre>
I do not see much about coloum 14, but I am guessing this file is stored somewhere and its corrupt. Update.xul suggests that it is the update file. Do you still have this in your downloads folder? There are two places for update and for a clean reinstall:
[http://www.mozilla.org/en-US/firefox/new/] in a private window will give you a new install or you can choose from here: [https://www.mozilla.org/en-US/firefox/all/]
This is what the file should look like; [http://hg.mozilla.org/mozilla-central/log/7a2edc5171e6/toolkit/mozapps/extensions/content/update.xul] If you can copy and paste that file from a working browser we can see the issue, but it will just look the same as the error.
if you can replace the contents of the file locally with what it should look like it will fix the error, but who knows if there are other errors. May be best to delete the updater and save all the profile folder contents.

Firefox won't open after re-installing and can't remove from control panel. What do I do?

After a storm and short power failure, I started having trouble with certain sites loading, and pages moving slower. I emptied my cache and defragged and ran total virus/ malware scan, but still had problem. (Pages loaded fine on AOL) I decided to uninstall Firefox and re-install to help fix problem. I did this, and now Firefox won't open, no matter if I double click, right click (open), or go through "all programs". I tried to uninstall and re-install again, but now I can't get it to respond through my control panel, either.

Try the procedures in the [[Firefox will not start]] article.

Firefox won't close

Since yesterday's upgrade, firefox won't fully close. It'll look like it has closed when I hit the red x but when I try to open a new instance I'll get an error saying that it's already running and can't be opened again until it's fully shut down.
I'll then see it running in windows task manager but when I tell it to "end process" it'll take five minutes or more to end the process and fully shut firefox down.
Is this a bug in the new version? The browser version is 29.0.1

hello bigtrees, yes unfortunately this is a known bug in the current version when you have set firefox to clear history on shutdown in certain situations. mozilla's developers are investigating the issue and working on a fix.

Loader/DNG Converter won't close after loading photos into Bridge

This is a very recent problem. Previously, after loading photos the loader would close, Bridge would open at the folder I created through the loader and that was it. Now after all shot are loaded, Bridge opens at the last folder I had open previously and the loader remains open. Clicking on the X box won't close it. I have to go into Task Manager to do this. I tried a full re-install to no avail. I've looked at preferences and don't see anything that helps.
I haven't done anything other than what I noted above. I tried re-installing PhotoShop and Bridge and that didn't fix the problem. The only other thing that has happened since I noticed this problem was that Windows updates automatically installed. I'm on Windows XP Pro SP3. The problem is not a show stopper but it is annoying.
Anybody have any ideas why this would happen and how to fix it?

OK, I tried changing the Preference by opening Bridge with the Ctrl key held down but I wasn't presented with the popup noted.
However -- D'OH! -- last night when I inserted my card into the reader and the dialog came up asking what I wanted to use to open I noticed that it was defaulting to Bridge CS3 (I still have some CS3 software on my machine). So I scrolled down, found Bridge CS4 and all is just fine. Thanks for the helps and tips. I do appreciate it. And I hope you can forgive my brain fart.

Mail won't close after security update

I just installed the recent security update (running 10.4.8) and now Mail won't close on either my Dual g% tower or on my iBook. In fact, both computers were unable to reboot after the install because the mail program needed to be force quit.
This was never a problem prior to the install of the security update.
Anyone have any ideas?
Thanks!

Problems arising right after installing a system update are usually the result of the problem already being there, or not having installed the update properly, or ignoring Apple’s "Important: Please read before installing" warnings, etc., rather than being caused by the update itself. In order to ensure that the update is installed properly, proceed as follows.
Verify/repair the startup disk (not just permissions), as described here:
The Repair functions of Disk Utility: what's it all about?
After having fixed all filesystem issues, if any, reinstall the update that appears to not have been installed properly.
Take a look at the following articles for guidelines on how to properly install system updates:
Troubleshooting installation and software updates
Installing software updates
Basically, you should verify/repair the startup disk before installing the update, no applications should be running while installing it, and you may experience unexpected results if you have third-party system software modifications (not normal applications) installed.
The above won’t solve the problem, but will allow us to at least troubleshoot it properly. Post back with your observations when done.
How many accounts do you have and what type are they (POP, IMAP, .Mac)?
In Mail, open Window > Activity Viewer. What do you see there when Mail refuses to quit? Actually, you may be able to avoid having to force quit Mail by canceling whatever it’s doing (by clicking on the red stop icon of the activity).
Do you have any Mail plug-ins or any system utilities that could interfere with Mail? In the Finder, go to each of the following folders (if they exist). What do you see there?
/Library/InputManagers/
~/Library/InputManagers/
/Library/Mail/Bundles/
~/Library/Mail/Bundles/
Note: For those not familiarized with the ~/ notation, it refers to the user’s home folder. You can easily locate any of the folders referred to in this post by copying the file path here, doing Go > Go to Folder in the Finder, and pasting the file path there.

Firefox won't start after installing an update from Apple - what to do?

I am not computer savvy. When I installed a recent update from Apple on my Mac. Firefox won't open. Safari wouldn't either, but an Apple tech led me through steps to fix it. He didn't know what to try for Firefox.
== right after update was installed and Mac restarted ==
== User Agent ==
Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10_4_11; en) AppleWebKit/533.16 (KHTML, like Gecko) Version/4.1 Safari/533.16

Then a clear CMOS would be the next logical troubleshooting step.
Here is a link to your motherboard specifications.
The information on clearing CMOS is at the bottom of the document.
This is usually the last step before giving up on a motherboard.
The problem you are facing is motherboard hardware firmware related.
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

Firefox won't close after checking plugins

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