Firefox will not open, Shows in processing not in applications in task Mngr

Fire fox won't open, but In HP task mngr, Showing as Processing but not in the Applications. Problem started when prompted to upgrade to 5.0 version

First check to see if an add-on is causing this problem, for details on how to do that see the [[troubleshooting extensions and themes]] article.
If that does not help, try creating a new profile. Firefox stores user data in the profile folder, creating a new profile will show if the problem is with the old profile. For how to do that see [http://kb.mozillazine.org/Creating_a_new_Firefox_profile_on_Windows Creating a new Firefox profile on Windows]. If the new profile works, you can transfer select data such as bookmarks and passwords to the new profile. DO not copy the preferences file, and it is best to re-install add-ons. For details of how to do that see [http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox transferring data to a new profile].

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I started working for ChaCha, and now firefox will not work unless I manually close it in the process tree every time I want to use it. I also cannot open more than 1 page at a time.

I started working for ChaCha 11/26/2010, I had to download a program to take incoming questions.
Ever since then, Firefox will not work correctly, even if I am totally logged out of ChaCha, and the page is closed, if I try to open my browser using Firefox, it will not open, I have to go into the processor tree and manually end Firefox, then it will work, but it will only let me open 1 page at a time. For example I have Firefox open now, but if I go and click on the icon to open it in a new browser, it will not open, I either have to close this, or use IE-I HATE IE lol.
I cannot use the ChaCha add on you have because it is not for the new version of Firefox, please help, I love Firefox, but not being able to open more than one window/page at a time does not cut it, nor does having to manually stop it from processing. I have tried re-installing it too.
Thank you, Melinda

I should add that I face the same problem with Safari and Google Chrome.

Firefox will not open. Hangs at "connecting" stage. Non-responsive even to process shut-down via task manager.

Starting yesterday, Firefox will not open at all. It hangs at the "connecting stage." For hours. It will not shut down even using the task manager for applications or processes, and it locks up virtually every other application. I thought I managed to save an open Word document yesterday - it looked like a slow, but normal save during the Firefox hang, but the document was empty when I restarted my computer.
Even though my machine is not pentium 4 based, I tried starting using the Windows XP/M configuration, I downloaded and re-installed (over the top of) the existing version, I verified that no Mozilla processes were running before trying to start Mozilla, and tried creating a new profile. Absolutely no success. Every time (of the dozens) I have tried to start Firefox I have had to force a hard shut-down to get out of the application. I have now unpinned Firefox from my task bar because I keep forgetting and hitting it by reflex.
I am running version 11.0 (at least that is what I just downloaded - I am not positive what I was running yesterday). My system is Windows 7 Home Premium, Intel Core i3, 2.4 gHz, 4 GB RAM, 64 bit OS.
Next option is to restore to a previous version. If that doesn't work, I will uninstall and start over from scratch.

A possible cause is security software (firewall) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.
See:
*https://support.mozilla.org/kb/Server+not+found
*https://support.mozilla.org/kb/Firewalls
*http://kb.mozillazine.org/Browser_will_not_start_up

Firefox will not open it just shows a black ms dos page- how can i save my bookmarks?

firefox will not open it just shows a black ms dos page- how can i save my bookmarks?

See here for Bookmark Backup
*http://kb.mozillazine.org/Backing_up_and_restoring_bookmarks_-_Firefox
Profiles - Where Firefox stores your bookmarks, passwords and other user data
Profile Backup
*http://kb.mozillazine.org/Profile_backup
*https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles
*https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data

My University email uses outlook and firefox will not let the page open once i log into the university login. It used to work, but now just shows a completely white tab. My email works fine in other browsers. Why?

My University email uses outlook and firefox will not let the page open once i log into the university login. It used to work, but now just shows a completely white tab. My email works fine in other browsers. Why?

Make sure that you haven't left a profiles.ini file.
* http://kb.mozillazine.org/profiles.ini_file
*http://kb.mozillazine.org/Profile_folder_-_Firefox

Removed working Firefox 7, Installed Firefox 10.0, Firefox will not load. When I click on icon, firefox.exe process shows briefly in task manager, then goes away....no errors, nothing

Removed working Firefox 7, Installed Firefox 10.0, Firefox will not load. When I click on icon, firefox.exe process shows briefly in task manager, then goes away....no errors, nothing. Never see browser panel at all. Also tried to install Firefox 9.0, but the same result was observed.

Rather difficult to say what the problem may be at present but for general info please have a look at
* [[safe mode]]
*[[firefox will not start]]
*[[firefox hangs]]
Note sometimes you may have to wait a while for firefox to shutdown completly, and if it has hung then as explained in the above articles you may need to kill any firefox.exe process that is still running (and maybe plugincontainer.exe)
Try starting firefox in [[safe mode]] e.g. by holding down shift key
* do not make any changes in the first window, just click on continue ? Do you get as far as seeing the options window for safe mode ?
If firefox is crashing see [[firefox crashes]], this is easier to work through if you can get firefox to start without crashing on startup. Currently some firefox users are finding Firefox 10 crashes on startup, and a new version Firefox 10.0.1 is being released very soon to deal with this and another cause of hangs.
Not saying any of this applies to your case but recent issues include
* ask tool bar causing hangs if video is used none English versions [/forums/contributors/708073]
* possibly some crashes do not start the crash reporter and other issues [/forums/contributors/708122?page=2#post-45059]
* some general info about current crashes [/questions/917748#answer-308124]

Firefox will not open on my laptop computer,It is my designated server but will not open???? Any ides why?

Firefox will not open on my lap top

No, nothing at all happens. Once clicked the 'circle' that suggest it is loading appears (if that makes sense) but no, nothing
Many thanks.
Can you check something for me please?
Restart your PC. after the PC restarts, bring up your Task manager, and go to the "Processes" tab. Click "Image name" to sort the processes alphabetically.
Now try to launch iTunes.
Does an itunes.exe process appear? If so, does it vanish after a second or so, or does it persist in the Processes tab (even though iTunes itself never shows up)?

Firefox will not open...please help.

My Mozilla Firefox will not open any windows, although it does start and show as running in my task manager. I have uninstalled and reinstalled it twice now and restarted my computer twice.
I CANNOT start Firefox in safe mode by holding down shift or using the "firefox/safe" in the run box.
I've tried it with applications closed, and open....I've tried it online and offline, I tried to run it in compatibility mode, I checked my computer for viruses...nothing helps.
I have read every troubleshooting item here but they only say try safe mode, or do something from Firefox when it is open such as reset it. I have no add-ons or extensions on Firefox and it just worked yesterday...also my computer is brand new Windows 8.1 12GB ram 2TB harddrive and everything else works fine.
please help

Hello,
Certain Firefox problems can be solved by performing a ''Clean reinstall''. This means you remove Firefox program files and then reinstall Firefox. Please follow these steps:
'''Note:''' You might want to print these steps or view them in another browser.
#Download the latest Desktop version of Firefox from http://www.mozilla.org and save the setup file to your computer.
#After the download finishes, close all Firefox windows (click Exit from the Firefox or File menu).
#Delete the Firefox installation folder, which is located in one of these locations, by default:
#*'''Windows:'''
#**C:\Program Files\Mozilla Firefox
#**C:\Program Files (x86)\Mozilla Firefox
#*'''Mac:''' Delete Firefox from the Applications folder.
#*'''Linux:''' If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it - see [[Installing Firefox on Linux]]. If you downloaded and installed the binary package from the [http://www.mozilla.org/firefox#desktop Firefox download page], simply remove the folder ''firefox'' in your home directory.
#Now, go ahead and reinstall Firefox:
##Double-click the downloaded installation file and go through the steps of the installation wizard.
##Once the wizard is finished, choose to directly open Firefox after clicking the Finish button.
Please report back to see if this helped you!
Thank you.

WARNING: Do not run Firefox's uninstaller or use a third party remover as part of this process, because that could permanently delete your Firefox data, including but not limited to, extensions, cache, cookies, bookmarks, personal settings and saved passwords. These cannot be recovered unless they have been backed up to an external device!

I upgraded from 3.6.13 to Beta 4.0 and now Firefox will not open at all I tried to uninstall to start again but it will not uninstall either it does nothing.

I uninstalled Beta 4 and re-installed 3.6.13 now Firefox will not open at all I tried to uninstall to start again but it will not uninstall either it does nothing, I have been using Firefox for a long time but cannot resolve this problem can anyone help and give me a solution please. As I use Firefox as my web browser it is very frustrating.
The fact it will not uninstall appears to be something completely new as nobody I know who uses Firefox has ever encountered this in the past.

Did you check your security software (firewall)?
A possible cause is security software (firewall) that blocks or restricts Firefox without informing you about that, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process.
See [[Server not found]] and [[Firewalls]] and http://kb.mozillazine.org/Firewalls
If necessary then also see:
* http://kb.mozillazine.org/Browser_will_not_start_up
* http://kb.mozillazine.org/Error_loading_websites

I have no navigation bar and firefox will not open in safe mode to reset to default config. Reinstalling doesn't work. Any help please.

I have no navigation bar ever since I closed it to gain more space on the screen. It won't re-open. Firefox will not open in safe mode, but opens immediately in normal mode with the new improper config, so I cannot reset to default config. I erased Firefox and re-installed and it still opens with the same faulty config. Why does Firefox not give me the safe mode dialog box, why can I not re-open the nav bar, and how can I do these two things, please? Firefox is currently unusable for me without a nav bar and without access to the default settings in safe mode. I cannot research the extensions I'm running since I have no nav bar to go to Tools, Add-ons, Extensions.
== This happened ==
Every time Firefox opened
== I closed the navigation bar to gain more space on the screen and I couldn't re-open it. ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; GTB6.4; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0)

Hit the '''Alt''' key to show the Menu bar, then open View > Toolbars and select Menu bar and Navigation bar, so they have a check-mark.

Firefox will not open unless I run it in compatibility mode (Windows XP SP 3), run it as an administrator, or launch it immediately after a reinstall (the reinstall thing only works once.) How do I fix this?

This morning, Firefox crashed. After this, when I click the Firefox icon, the hourglass appears and then nothing happens. Firefox does briefly appear in the task manager when I do this.
I tried rebooting. I tried reinstalling multiple times. (Firefox will run when I select "Launch Firefox" from the installer. Then the problem occurs again.) I tried safe mode. I have found that Firefox will work if I select Windows XP compatibility mode from the icon properties menu or if I run the program as an administrator. When I do this, Windows asks me if I want a program to be able to make changes to my computer.
I have noticed that a Windows Error Report is being generated each time Firefox will not open.

A possible cause is security software (firewall,anti-virus) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.
See:
*https://support.mozilla.org/kb/Server+not+found
*https://support.mozilla.org/kb/Firewalls

Firefox will not open new web pages.

When I open firefox it goes to the firefox default page with one blank new tab. New tabs will open with blank page but Firefox will not go to any new sites just stays on blank pages. I have already tried starting in safe mode, creating a new profile, and un-installing and re-installing and the problem persists.
It is not blocked by either my firewall or antivirus program.
This all seems to have started after an automatic update made by Firefox.

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!

Firefox will not launch, but shows in task manager, after updating graphics drivers to AMD's 13.1.

Hi,
After updating to the AMD 13.1 drivers, on my 5770, Firefox will not launch; it does, however, show in the task manager. I should note that it will start in Windows safe mode; when I had it open in safe mode, I used that time to disable all plugins, add-ons, extensions, and created a new profile. This did not help. I also tried launching Firefox in to its safe mode, and had no luck with this either.
I experienced this problem once before, when trying to update to a previous version. I believe I was moving from 12.1 to 12.4, but I'm not 100% sure of that. Ultimately, my solution then was to retrograde back to my previous driver. The steps mentioned in the previous paragraph did not help at that time, not did a complete reinstall.
15 years of computer repair experience, and this has me baffled.
Thank you to anyone who might be able to help.
Possibly relevant specs.
Windows 7 Ultimate x64
AMD Phenom II x4
6BG Ram
AMD 5770 graphics, running Catalyst 13.1

By any chance, did you disable Firefox's use of hardware graphics acceleration? To avoid a round-trip through Windows Safe Mode, you could try adding these to your prefs.js file while Firefox is closed.
To quickly open the folder with the correct prefs.js file, you can use
Help > Troubleshooting Information > "Show Folder" button
Because Firefox may overwrite change to this file at shutdown, you should edit it after closing Firefox and allowing a few moments for Firefox to finish updates to the files.
These are the preferences I think are most relevant:
user_pref("gfx.content.azure.enabled", false);
user_pref("gfx.direct2d.disabled", true);
Does that make any difference?

After upgrading to 27, firefox will not start. Saw an error message during the upgrade process.

After upgrading to 27, firefox will not start. Saw an error message during the upgrade process but cannot remember.
Tried to run firefox.exe -P but receive error message:
XML Parsing error: undefined entity
Location: chrome://mozapps/content/profile/profileSelection.xul
Line number 18, Column 1:
<dialog
^
Running on Windows XP SP3. No problem whatsoever before upgrading to 27. Sending this from Chrome as I cannot open Firefox at all.

Thanks jschaer2000: after starting it once in safe mode, I closed Mozilla and tried several restarts in normal mode. So far, all worked:-)
Thank you very much again.
Still the automatic update process bothers me: it took me several days to discover the reason to the malfunction, since when I removed the problematic version from Add and Remove Programs, I didn't pay attention at first that it was another version, not v26 which I installed from my folder.
In addition, I like to save the installation files before I run new programs and if I didn't have v26 exe file, I couldn't have operated Mozilla at all. Not that it was fun to remove and install again each time v27 didn't react, but it was better than nothing, I still prefer Mozilla over its competition.

Firefox will not display on the screen even though with Process Explorer I see Firefox.exe active but no CPU usage

I use Firefox v10.0.2 as default browser on Dell XPS8300 e/w Intel Core i5 & Windows 7 Ultimate and Compaq Presario CQ57 e/w Intel Core i3 & Windows 7 Home. More frequently on the (about 90% of attempts) than the Dell (50% of attempts) Firefox will not display to the screen when I click on icon. When it happens I cannot display other programs. I specifically say display because I believe Firefox has started. To circumvent the problem I installed Process Explorer on both machines and start this program first then click on Firefox icon. When problem occurs I can see Firefox.exe process in Process list; some CPU consumed but, then, no CPU activity. If I click on Firefox icon again another process opens in Process list but with same response - some CPU consumed and then no CPU activity. If I have 2 processes running and kill the 1st process, the 2nd will display and everything from then on is normal. If I do not open a 2nd process but kill the 1st process then click on Firefox icon Firefox is displayed and everything from then on is normal. This problem has occurred since original installation on both new machines. I've updated video drivers in both machines.

Ok, let's see if we can fix this and get it working for you!
First, if you start Firefox in [[safe mode|safe mode]] (restart your computer first, then when you open Firefox, hold down the shift key) does it start up more reliably? This is usually caused by a faulty add-on. If it does help, then restart Firefox, go into the Firefox button, then add-ons, and disable your extensions one by one until you find the trouble maker.
Also, try updating to Firefox 11, it has several bug fixes that might make life easier here.
Just as a few basic troubleshooting steps to make sure we have all the bases covered,
Run all Windows Updates, install all needed service packs, etc.
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 will not open, Shows in processing not in applications in task Mngr

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