New FireFox 29 upgrade keeps experiencing " Firefox is alreay running" errors.

I'm running Windows 8.1 and was using Firefox seamlessly. Since the upgrade to Firefox 29, it keeps experiencing " Firefox is already running" errors. I then have to end it in task manager to launch it. I've deleted the parent.lock several times with no luck. I've uninstalled and reinstalled Firefox several times with no luck. I'm using Windows firewall and Avast Antivirus. I even uninstalled Avast temporarily, in case it was causing problems, no change. I have Firefox on my daughter computer and it's been upgraded to Firefox 29 as well. Her computer is running Windows 7 and experiencing no problems. Please help, I've resorted to using IE11. I don't like chrome, opera, etc and want to return to Firefox.

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:<br>
[[Image:FirefoxSafeMode|width=520]]<br><br>
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'' <br>(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.

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I deleted my foxfire profile contents and now get firefox is already running error. reinstall did not help

I deleted the contents of my profile. Now i get the firefox is already running error. i realize that i screwed up. i have restarted, uninstalled, reinstalled, but still firefox will not load.

You can get that error if Firefox can not find the profile folder. For details on what to check see http://kb.mozillazine.org/Profile_in_use

I tried a fresh install and get "Firefox is already running" error

Win XP SP3. Links in web pages opened in Firefox were not working. I tried reinstalling latest Firefox version over existing version. Didn't help. Uninstalled Firefox, reinstalled; didn't help. Did a total uninstall including manually removing all Firefox files and folders. Rebooted in-between. Now I keep getting the error message "Firefox is already running ..." Tried the steps in the article in your database but no longer have a profile. Bottom line: can no longer install a working version of Firefox.

You probably did delete the Firefox profile folder, but didn't remove the profiles.ini file, so Firefox isn't able to find the old profile and displays misleading and confusing error message.
* http://kb.mozillazine.org/profiles.ini_file
* https://support.mozilla.org/kb/Firefox+is+already+running+but+is+not+responding
You can delete profiles.ini to make Firefox create a new default profile or use the profile manager to create a new profile.
See "Basic Troubleshooting: Make a new profile":
*https://support.mozilla.org/kb/Basic+Troubleshooting#w_8-make-a-new-profile

"Firefox is already running" error while opening a Firefox Document

I am a web developer, so I decided to have different versions of Firefox in order to test my web pages.
Thus I decided to install Firefox 3.6 in "C:\Archivos de programa\Mozilla Firefox\Firefox 3.6", Firefox 4 in "C:\Archivos de programa\Mozilla Firefox\Firefox 4" and Firefox 5 in "C:\Archivos de programa\Mozilla Firefox\Firefox 5".
Moreover, each version has its own profile. In 'profiles.ini' I moved the line 'Default=1' from 'default' profile to 'Firefox 5' profile.
Since then, if Firefox has started, when I try to open a Firefox Document (like .htm or .xml) from a folder, I get "Firefox is already running, but is not responding" error. But the fact is that Firefox is responding correctly. If I write the file's location in Firefox's location bar it works properly.
In the registry, the FirefoxHTML's open command is "C:\Archivos de programa\Mozilla Firefox\Firefox 5\firefox.exe" -requestPending -osint -url "%1". Is it rigth?

I don't have much difficulty with this problem. It's more of an annoyance.
A ''frequent'' annoyance.
What I'll do is log in to a page that requires a secure connection, and when I'm finished, to complete the security, I always close the browser. Then, of course, I start the browser up again.
The problem is, ''Firefox is still shutting down'', and issues this error. Most of the time, I can wait 10 seconds, then start up fine.
'''So my question is,''' why the heck can't the process that detects that Firefox is still running do the waiting for me? Instead of popping up a message, "Firefox is still running", pop up a message, ''"Firefox is cleaning up from the last shut-down, one moment please"'', then start up again.
I hate to mention it, but none of Firefox's competitors have any problem with starting up too soon after a shut-down.

How can I stop from getting the "Firefox is already running" error message when trying to open links and FF has already been opened through a symbolic link?

I use symbolic links and program shortcuts as a way to easily open different Firefox profiles ie. one for casual/personal use and another for work. This works well, but I get the "Firefox is already running, but is not responding" error message if I try to open external links with FF as my default browser. FF is actually open and running fine, but I guess it doesn't acknowledge this fact because of how I'm originally starting the process.
I wasn't able to add the symbolically linked executables to the default program pane. Is there a way to bypass this error or other way to fix this?
The solution to the question linked below is what I'm using to open the different FF profiles.
http://superuser.com/questions/255312/pin-same-app-multiple-times-in-windows-7

hello, this is probably happening when you run the default profile with the -no-remote switch.
http://kb.mozillazine.org/Profile_in_use

"Firefox is already running" error

I am running Windows 7 with 3 different user profiles, all of which run Firefox seamlessly, but one. I have tried the different options listed on the main forum for this; however, the issue persists. I have uninstalled and reinstalled the application, with no success. The only thing I did have problems understanding/completing was finding the profile for the one user>parent.lock file. I never found this file. I'm not sure, at this point, what else to do. I have run a virus scan and it's all good. Any suggestions? What am I missing here?

I don't have much difficulty with this problem. It's more of an annoyance.
A ''frequent'' annoyance.
What I'll do is log in to a page that requires a secure connection, and when I'm finished, to complete the security, I always close the browser. Then, of course, I start the browser up again.
The problem is, ''Firefox is still shutting down'', and issues this error. Most of the time, I can wait 10 seconds, then start up fine.
'''So my question is,''' why the heck can't the process that detects that Firefox is still running do the waiting for me? Instead of popping up a message, "Firefox is still running", pop up a message, ''"Firefox is cleaning up from the last shut-down, one moment please"'', then start up again.
I hate to mention it, but none of Firefox's competitors have any problem with starting up too soon after a shut-down.

Old Flash in new Firefox won't run, no warnings.

Opened my laptop using a current version of FF but with Flash 11.9. Viewed one of my pages with Flash content and.... nothing, just an empty div. No warnings that Flash was out of date, etc. So if I have this right FF won't run out of date Flash for security reasons. Fine. I've always seen warnings in these cases. But apparently if Flash is old enough FF just doesn't bother. Visitors have no idea what is happening. It just looks bad.
Is this correct? What is the recommended way of dealing with this from a developer's viewpoint?

We strongly recommend that users always run the latest version of Flash Player. Running an old version puts users at risk for malware infection. The vast majority of users are opted in to background update and are kept updated automatically, but there are users that for whatever reason have chosen to stick with an old, vulnerable version of Flash Player. While this is a bad idea, people are certainly free to do it. The upside is that the affected population that you're describing is pretty small.
The upgrade story will actually get better over time. The latest versions of both Google Chrome and Internet Explorer include Flash Player as a built-in component, distributed with the browser. Users are always updated with the latest version of Flash, and new updates are delivered inline via the Chrome updater or Windows Update respectively. Mozilla has spent a few years talking about how Flash needs to go away, while the other browser vendors have been investing in modernized plug-in interfaces and improvements in plug-in security, and unfortunately the prioritization is showing in the user experience. We're hopeful that Windows 10 will pick up the majority of the WinXP and Vista stragglers as well as many of the Win7 - Win8.1 users, which means that the whole Flash update problem for a very large population of people will be solved in IE once people upgrade.
It's hard to say what's at the root of the specific issue you're describing. With the major browsers on 4 or 6 week major update cycles (we publish monthly to ensure we can catch and address any new injections in the browsers that might come up in nightly/beta versions before they hit the general population, and to align with Microsoft patch tuesday), so you're talking something like 18 months worth of changes between the Firefox version you're running and the version of Flash that you're running. Everything at Mozilla gets done with bugs, and we'd definitely encourage you to file a bug on the user experience that you're seeing. They've been operating from a reactive place lately, and some of the changes that impact Flash definitely appear to be a little slapdash. It's ultimately good for them to hear from the developer community and not just me all the time, but feel free to add me to the CC: list in the bug.
We ultimately have no control over the longevity of a particular build of Flash -- there are way too many external variables -- and we're also investing a huge amount of effort in proactive security work (and it's been our top engineering priority for years). So each build usually includes large numbers of changes designed to either harden the player or address responsibly disclosed issues from researchers, the larger security and computer science communities and whatever the latest auditing and testing tools we can get our hands on are. The continuous stream of innovation and ingenuity in the offense space is impressive, but keeps us pretty busy. Browser-side changes can easily break older versions of the plug-in, and running an old version is just a bad idea.
So we've really streamlined the installation process to keep people on current versions, and Windows 10 will hopefully be a massive shift away from older, more vulnerable versions of Windows. The landscape is so different than it was even 4-5 years ago.. the days of running anything for years (or months) in your browser are long gone. The pace isn't going to slow down anytime soon, either.

Trying to download new firefox get a download error. What association must I change in preferences for the download to work?

Have a Pentium4 with Windows XP and have been using Firefox 3.6 happily.
Tried to download the new version as Firefox urged me to and got error message that download failed Firefox setup could not be opened because the associated helper application does not exist. Change the association in your preferences.
OK how do I do this and what association do I change it to?

get latest version of Firefox from
* getfirefox.com

Updated to new firefox 5-now get error can't initialize the apps security component won't display websites-using AVG11-used firefox help file to allow fire.exe to run, & restrted by still no go-first update i've had problems with, thanks for the help

see above

Probably you could start the oracle database with SQLPLUS, and it will output the errors in dialog.
Eks:
log on as sidadm:
sqlplus / as sysdba
sql> startup
It will tell you if any table spaces are in recoverymode or offline.
A better walkthrough can be obtained in my blogpage on similar matters:
http://shortdump.blogspot.com/2006/12/how-to-recover-damaged-oracle-instance.html

If Firefox is set as the default browser, and any application attempts to open a new window, this fails and I get the error "Firefox is already running..."

Here is what I am running:
Microsoft Windows 7, Service Pack 1, Fully updated to 4/10/2012
Fresh Install of Firefox 11. No add-ons enabled as a result of troubleshooting.
I am a user with administrator rights
UAS is disabled.
To begin, this has been going on Since Firefox 10 or so. A few months now.
I am able to open Firefox. My add-ons worked (ABP, Flashblock, ABP Element Hiding Helper, IETAB2, Downthemall, Greasemonkey, 4chan extension) had no problems. Firefox is set and has been set for the last two years as my default web browser.
However Since approximately Firefox 10 or so, maybe before that, If I have a Firefox session open, and any other application attempts to open a session in a new window, I get the Firefox is already running, but not responding error."
I attempted to follow troubleshooting advice already posted (look for parent.lock files left behind [none present], multiple sessionstore.js files [none present], create a new user profile, attempted to clear out the "read-only" permission in windows 7, however as soon as it is cleared, the read only permission returns.)
As a last resort, I deleted the Firefox folder, the %APPDATA%/Mozilla directory in its entirety, then utilized CCleaner to remove any and all references to Firefox in the windows registry, then did a full re-install, no extensions installed right now.
I checked preferences and have the option "open new windows in a new tab" checked off. The problem persists regardless if this option is checked on or off. This problem persists in or out of safe mode, even with the brand new install.
Test Cases:
All cases:
Firefox is selected as the default browser for windows 7
Case 1: Open a firefox session. Utilize any other program that attempts to open a link to their website in a new browser window or new browser session. Experience "Firefox is already running" error
Case 2: Open a firefox session. Right click on Firefox on the task bar. Select "open in new window". Experience "Firefox is already running" error
Case 3: Open a firefox session. Select the Firefox Menu > New tab > New Window. A new window will actually open.
This is the only method of opening a new window in the same browser session or profile that actually works on my system. Attempting to open a browser session from the task bar "open new window dialog" or opening a new window while a current window/session is running will not open firefox in a new window or a new tab in the current session. The "Firefox is already running, but is not responding" error will occur every time.

Cor-el's suggestion resolved my problem. Apparently the MOZ_NO_REMOTE variable was set to 1 on my system variables. I never made it, and really have no idea how it got there, but deleting this variable and restarting firefox has resolved the issue. Thanks Cor-el!
Marking case: Solved
Solution: Verify the MOZ_NO_REMOTE variable is NOT set to 1. This can be achieved by simply deleting this variable.

I can not delete my history and adding new bookmarks. Upgrading to later Firefox versions and/or re-installing didn't help. The address bar still shows the web addresses of old and whenever I make new bookmarks, it's always gone as if it was never made.

I can not delete my history and adding new bookmarks.
Upgrading to later Firefox versions and/or re-installing didn't rectify it either.
The address bar still shows the web addresses of old and whenever I make new bookmarks, it's always gone as if it was never made.
Also, I have noticed that every once in awhile you can not close tabs you've opened, either by pushing on the X button and/or clicking on the mouse to close it. Although closing the window and opening it again (without closing the Firefox application) seemed to rectify the problem in the short term, it's becoming quite annoying.
== This happened ==
Every time Firefox opened
== the Firefox is being used

I think I have a solution.
First, download the add-on SQManager. This should be included with FireFox, it is really good.
Look for the file '''moz_hosts''' in the folder '''places.sqlite'''.
Don't delete the file, just delete the information in the file. My file has over 3600 websites, which go back years!! I did not know they were there, but I was frustrated about not being able to get rid of them. They popped up every time I used the address bar. Clearing my history would not get rid of them.
This is where they are stored!! I found that by deleting the pesky web site from '''moz_hosts''', it does not appear in my address bar anymore!!!
I think that if I just delete all the websites in moz_hosts....
Wa-la...History Gone!!!
As long as you don't delete the file, just empty it, FireFox won't know the difference. It will just keep adding websites to it until you empty it again.
Why running "clear recent history" doesn't do this, I don't know. You are doing manually what "clear recent history" is not doing.
Please tell me if you see any flaw in this.
''I think it's the solution we've all been looking for!''

After "upgrade" to new firefox, bookmarks didn't transfer. Help tells how to import from another browser but not old firefox. Also my anti virus (latest update) apparently not compatible with 4.0 Can I restore my old version

Question
After "upgrading" to new firefox none of my bookmarks are in new bookmarks help topics tell me how to import from another browser but not from previous version of firefox. Another problem is my anti virus ( most up to date) is apparently not compatible with 4.0 liked the old firefox would never have "upgraded" had I known my anti virus wouldn't work. Can I get old version back

Check with Kaspersky as to what versions of Firefox their programs are compatible with. It is up to Kaspersky to keep their stuff up to date as Mozilla releases new versions of Firefox. And if they are unwilling or incapable of doing it, they should inform their customers of such and maybe refund their customers instead of stringing them along.
http://forum.kaspersky.com/

When I click to open firefox it says that "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" and I've tried to shut down and restart my computer but it keeps

when i click to open firefox it says that "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." and I've tried to shut down and restart my computer but it keeps showing the same message. I've even uninstalled Firefox and then reinstalled in the hopes that the problem would be solved but it this message is still popping up. What can I do to solve this problem?
== This happened ==
Just once or twice
== I was on facebook trying to upload pictures yesterday. ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.0.3705; .NET CLR 1.1.4322; Media Center PC 4.0; InfoPath.1)

Do you have a profile lock file in your profile folder? If so, delete it and see if TB runs properly:
http://kb.mozillazine.org/Profile_in_use#Remove_the_profile_lock_file

HELP! My old mac was requested to upgrade Firefox to 14.0.1. After the sucessfully installation, I received a message saying my old Mac couldn't use the new Firefox and Safari crashes. I have NO browser now!!!

My old mac was requested to upgrade Firefox to 14.0.1. After the sucessfully installation, I received a message saying my old Mac couldn't use the new Firefox and Safari crashes. I have NO browser now! Any help would be appreciated.

Hmmm... So you upgraded Firefox and now neither Firefox or Safari will work? Very weird. I have no idea what might have gone wrong. That said, when things start acting wierd, I always try a bit of maintenance first. About 95% of the time, I luck out and it works.
I use the free program Onyx. I run all the clean up routines. Then I boot to the recovery partition (Lion) or the OS X Install Disc and repair permissions and verify/repair the hard disk.
Hope this helps.

I keep getting this message after closing Firefox and attempt to reopen-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 keep getting this message after closing Firefox and attempt to reopen-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.

See:
* http://kb.mozillazine.org/Recovering_a_missing_profile
* http://kb.mozillazine.org/Profile_in_use

New FireFox 29 upgrade keeps experiencing " Firefox is alreay running" errors.

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