Unable to start Firefox

Hi, when trying to start Firefox, I get the message 'Process is already running.....'
1) The process is not running I have checked.
2) I have rebooted (numerous times.)
3) I have uninstalled Firefox and reinstalled and rebooted and the message still appears.
4) I have tried to find my lock file and have no idea what Charms are (Mozilla advice on finding the file to delete by hovering in the bottom right of the screen.)
5) I have entered the appdata string in my Start/Search and nothing is found.

See the [["Firefox is already running but is not responding" error message - How to fix it]] article, if you havent already.

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I am unable to start Firefox. Getting message that it's already running. Can't find my profile using "%APPDATA%\Mozilla\Firefox\Profiles|". What do I need to do

I am unable to start Firefox. Getting message that it's already running. Can't find my profile using "%APPDATA%\Mozilla\Firefox\Profiles|". Rebooting my computer didn't help. Since I experienced that problem I also noticed that all my bookmarks which I had copied into the Windows Internet Explorer have also disappeared. I am using Firefox as my primary search engine and usually don't use Internet Explorer. I am running Windows 7 on my machine.

Try this add on [https://addons.mozilla.org/en-US/firefox/addon/open-profile-folder/ Open Profile Folder]

I am running Firefox with SuSE Linux, after a power outage I am unable to start firefox

checking the processes using "ps aux" reveals no mozilla/firefox processes running.
also checking in the /home/username/.mozilla/firefox directory I can find no log files.

Did you try to start Firefox in [https://support.mozilla.com/kb/Safe+Mode Save mode] ?
Create a new profile as a test to check if your current profile is causing the problems.
See:
* [https://support.mozilla.com/kb/Basic+Troubleshooting#w_8-make-a-new-profile Basic Troubleshooting: 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 that new profile works then you can transfer some files from the old profile to that new profile (be careful not to copy corrupted files)
See:
* http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

[Solved it] Unable to start Firefox/profile is corrupted

Edit: For some reason, I could solve the problem with chkdsk; the folder is now okay again and I can also start Firefox with no problems (although I would still like to know why this even happened), but thanks anyway!
Hello, some minutes ago I tried to start Firefox and got the "Firefox is already running, but not responding" message. I thought this was strange as I had only just started the computer and now matter how often I try, Firefox will only shortly show up in the task manager and disappear after that. But even after trying to start it again, I get the same message...
I thought maybe there's a problem in the Appdata folder and when I tried to access my profile there (in roaming), I'll get a message saying that the path does not exist and the folder cannot be accessed and also that the file or directory may be corrupted. By the way, the profile under local seems fine. After that, I also tried deleting the Temp folder and updating the Firefox version, but that didn't change anything.
At first, I thought there may be an issue with the folder being "read-only" and that's when I saw that apparently the size of the profile folder is 0 bytes... If that is the case, I can imagine that Firefox cannot start, but why would it say that it's already running? And apart from that, I have no idea what could have caused this as everything worked fine just a few hours earlier. I just now also tried starting Firefox on a different account here on Windows (7), and there were no problems, either.
I save my profile every few months so I really don't want to delete the profile folder >< I even just copied the last backup (only three weeks ago) somewhere else within the profile folder, so that too is inaccessable right now...

Very nice work.
These add-ons can be a great help by backing up and restoring Firefox
'''[https://addons.mozilla.org/en-US/firefox/addon/febe/ FEBE (Firefox Environment Backup Extension)]''' {web link}
FEBE allows you to quickly and easily backup your
Firefox extensions, history, passwords, and more.
In fact, it goes beyond just backing up -- It will actually rebuild
your saved files individually into installable .xpi files.
It will also make backup of files that you choose.
'''[https://addons.mozilla.org/en-US/firefox/addon/opie/ OPIE]''' {web link}
Import/Export extension preferences

When starting Firefox 3.6.11 the CPU goes to 100%.

After upgrading from 3.6.10 to 3.6.11 I'm unable to start Firefox in a reasonable period of time (3 minutes). The CPU goes to 100% for one of my 4 cores, when left to its own, the Firefox window appears after 18 minutes 43 seconds. My CPU is a Q6700 (Quad 2.66Ghz).

How can I go back to 3.6.10??

Trying to reinstall firefox on a windows 7 machine and I get "The application was unable to start correctly (0xc0000142)"

In troubleshooting a different issue I uninstalled Firefox. After fixing the other issue I'm tying to re-install Firefox and am getting an error message that says "The application was unable to start correctly (0xc0000142). Click OK to close the application." The title bar of the window says "setup-stub.exe - Application Error." My PC is a Dell Studio 19 All-in-one running Windows 7 Home Premium.

When I look up that error on Microsoft's forums, I find suggestions ranging from an incompatible update/hotfix to malware...
* [http://answers.microsoft.com/en-us/windows/forum/windows_7-system/the-application-is-unable-to-start-correctly/bbb9c037-77b3-4fae-93b9-ded70f7f9a17 the application is unable to start correctly 0xc0000005 after windows - Microsoft Community]
* [http://answers.microsoft.com/en-us/windows/forum/windows_7-system/the-application-was-unable-to-start-correctly/84abc6b7-d189-4bdf-a93e-a90f06479d9f The application was unable to start correctly (0xc0000005). - Microsoft Community]
* [http://answers.microsoft.com/en-us/windows/forum/windows_7-system/the-application-was-unable-to-start-correctly/515b2320-9ad2-4afc-b817-e63bbfe8e134 The application was unable to start correctly (0xc0000005). - Microsoft Community]
(There are many more along these lines)

How do I fix this? "Firefox is unable to start correctly (0xc0000056)" I can't start in Safe Mode, either.

My Firefox does not open, at all. When I try to open i get the message that says "Firefox is unable to start correctly (0xc0000056)". I have tried to run the Firefox crash report, which also does not run. I'm unable to start in safe mode, also. All I get, is the above message...nothing else.

I'm not using that extension, so I do not know which files are used in addition to sessionstore.js and you need to check the profile folder yourself for suspect files.
This can be a problem with the file [http://kb.mozillazine.org/sessionstore.js sessionstore.js] in the [http://kb.mozillazine.org/Profile_folder_-_Firefox Profile Folder] 
Delete the files sessionstore.js and sessionstore.bak and any existing files sessionstore-##.js with a number in the left part of the name like sessionstore-1.js .
See http://kb.mozillazine.org/Session_Restore

I logged on to the Tom Tom site last Sunday to download maps for a GPS. Since then the TomTom site appears each time I start Firefox. I am unable to locate the instruction making this happen. Can you please assist?

Can you help me to find what is prompting Tom Tom to be my home page although I have another specified in my "Preferences"

Hello,
'''Try Firefox Safe Mode''' to see if the problem goes away. [[Troubleshoot Firefox issues using Safe Mode|Firefox Safe Mode]] is a troubleshooting mode that turns off some settings and disables most add-ons (extensions and themes).
''(If you're using an added theme, switch to the Default theme.)''
If Firefox is open, you can restart in Firefox Safe Mode from the Help menu by clicking on the '''Restart with Add-ons Disabled...''' menu item: 
[[Image:FirefoxSafeMode|width=520]] 
If Firefox is not running, you can start Firefox in Safe Mode as follows:
* On Windows: Hold the '''Shift''' key when you open the Firefox desktop or Start menu shortcut.
* On Mac: Hold the '''option''' key while starting Firefox.
* On Linux: Quit Firefox, go to your Terminal and run ''firefox -safe-mode'' (you may need to specify the Firefox installation path e.g. /usr/lib/firefox)
''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 [[Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems]] article to find the cause.
''To exit 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 others with the same problem.
Thank you.

Error the application was unable to start correctly (0xc0000018)

Hello All,
If anyone could guide me on a step by step fix on how to fix error the application was unable to start correctly (0xc0000018)*. I receive this error message when I click on my Design Center. I have successfully installed the Warehouse because I received the successful pop up screen after I completed the installation process. I have Windows 7 64 bit. I noticed on other forms that there is no real fix but it has be something I can do to start using my warehouse. If this helps, the Design Center gives me an error message and the Repository Browser doesn't work. I am also using Firefox. Any help is greatly appreciated.

This might help:
Problem in Lunching OWB Design Center

After updates i am unable to open firefox and have to reset comp to earlier date, my comp is new please help?

i get a prompt to update firefox and i do then when i try to start firefox i am unable to. i have back-up my computer to previous date and the uninstall and re-install firefox to find the same prompt for updates from firefox and i cant ignore it so it is always there.

It's possible that you are having a problem with some Firefox add-on that is hindering your Firefox's normal behavior. Have you tried disabling all add-ons (just to check), to see if Firefox goes back to normal?
Whenever you have a problem with Firefox, whatever it is, you should make sure it's not caused by one (or more than one) of your installed add-ons, be it an extension, a theme or a plugin. To do that easily and cleanly, run Firefox in [http://support.mozilla.com/en-US/kb/Safe+Mode safe mode] (don't forget to select ''Disable all add-ons'' when you start safe mode). If the problem disappears, you know it's from an add-on. Disable them all in normal mode, and enable them one at a time until you find the source of the problem. See [http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes this article] for information about troubleshooting extensions and themes and [https://support.mozilla.com/en-US/kb/Troubleshooting+plugins this one] for plugins.
If you need support for one of your add-ons, you'll have to contact its author.
If the problem does not disappear when all add-ons are disabled, please tell me, so we can work from there. Please have no fear of following my instructions to the line, as all can be easily undone.

I am unable to Open Firefox,Even after Reinstalling it,It Crashes in seconds loading homepage

I am Unable open any page,It crashes after Loading homepage in seconds,i tried Reinstalling several times.
-Kindly help!!!
== This happened ==
Every time Firefox opened
== I started my Desktop

For us to look at your crash report please read:
https://support.mozilla.com/en-US/kb/Mozilla+Crash+Reporter#Viewing_reports_outside_of_Firefox
Paste the contents of a few of the text files in the ''submitted'' folder here.
If you close Firefox, then start Firefox in Safe Mode, does the problem still occur? For instructions on starting in Safe Mode, see [[Safe Mode]].

I want to STOP the automatic loading of the tab that tells me "Almost There!" or "Your Almost There" suggesting that I download the new version. I DO NOT WANT A NEWER VERSION- and I am SICK of seeing this tab open when I start Firefox. How do I stop this?

''Duplicate post, continue here - [https://support.mozilla.com/en-US/questions/781986]''
I find this reminder/suggestion to upgrade Firefox EXTREMELY annoying. How do I stop it? What about:config settings do I change-- because I have been unable to find the one that will do the trick.

See these articles for some suggestions:
* [[Firefox has just updated tab shows each time you start Firefox]]
* [[How to set the home page]] - Firefox supports multiple home pages separated by '|' symbols
* http://kb.mozillazine.org/Preferences_not_saved

After a seach when I click on one of the resulting links I get : Unable to connect -Firefox can't establish a connection

Unable to connect
Firefox can't establish a connection to the server at 0.r.msn.com.
The site could be temporarily unavailable or too busy. Try again in a few
moments.
If you are unable to load any pages, check your computer's network
connection.
If your computer or network is protected by a firewall or proxy, make sure
that Firefox is permitted to access the Web.

'''Try the Firefox Safe Mode''' to see how it works there. The Safe Mode is a troubleshooting mode, which disables most add-ons.''
''(If you're not using it, switch to the Default theme.)''
* You can open the Firefox 4.0+ Safe Mode by holding the '''Shift''' key when you use the Firefox desktop or Start menu shortcut.
* Or use the Help menu item and click on the '''Restart with Add-ons Disabled...''' menu item while Firefox is running.
''Don't select anything right now, just use "'Start in Safe Mode"''
''To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before using the Firefox shortcut (without the Shift key) to open it again.''
'''''If it is good in the 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.
''When you figure out what's causing your issues, please let us know. It might help other users who have the same problem.''
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!
Many site issues can be caused by corrupt cookies or cache. In order to try to fix these problems, the first step is to clear both cookies and the cache.
Note: ''This will temporarily log you out of all sites you're logged in to.''
To clear cache and cookies do the following:
#Go to Firefox > History > Clear recent history or (if no Firefox button is shown) go to Tools > Clear recent history.
#Under "Time range to clear", select "Everything".
#Now, click the arrow next to Details to toggle the Details list active.
#From the details list, check ''Cache'' and ''Cookies'' and uncheck everything else.
#Now click the ''Clear now'' button.
Further information can be found in the [[Clear your cache, history and other personal information in Firefox]] article.
Did this fix your problems? Please report back to us!

I installed a game and when i start mozilla i am unable to start with the my home web page how can i fix

i installed a game and when i start mozilla i am unable to start with the my home web page. i set my home page in options tools. when i open Mozilla it opens in another page that i do not want

Some add-on or other software included with the "game" you installed might have "hijacked" your Firefox home page. I take it you tried resetting your home page? Ref: [[How to set the home page]]
See this article for links to other possible solutions:
*[[Fix problems with your home page or search]]

Unable to reset firefox.

Hi
My PC is on Win9 and firefox. Reformatted 2 months ago.
Unable to save some webpages for the past couple of days, I did the usual "reset firefox" when I have these kinds of problems. But this time it would not reset. I get the msg:
"Well, this is embarrassing.
Firefox is having trouble recovering your windows and tabs. This is usually caused by a recently opened web page.
You can try:
Removing one or more tabs that you think may be causing the problem
Starting an entirely new browsing session"
No webpage was open at this time. Also unable to update firefox.
Please help.
Thanks

I will be glad to help, but I am not one of the big guys. Someday, maybe.
If you ask a question, and don't understand the answer, ask them to
explain better.
Happy Computing.

Unable to start Firefox

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