Everytime I close a session of Firefox I get the message "FF is al actief, maar reageert niet..." I can close it with taskmanag. I already installed FF again

Everytime I close the browser of Firefox, and want to open it again afterwards, I get the message "FF is allready active, but doesn't respond...." I know I can close FF with the taskmanager, but to have to do it time and time again, is totaly not workable ? I already uninstalled and installed FF again (latest version), but the problem stays the same. I already use FF for many years and didn't have that problem, untill a little while ago

Make sure that Firefox closes properly and that there isn't a hanging Firefox or plugin-container process left in the task manager.
Use "Firefox/File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit") to close Firefox if you are currently doing that by clicking the close X on the title bar.
See:
*"Hang at exit": http://kb.mozillazine.org/Firefox_hangs
*"Firefox hangs when you quit it": https://support.mozilla.org/kb/Firefox+hangs

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When I open Firefox I get the message "Firefox is already running but not responding . . .

I am using Firefox 3.6.9 with Windows XP SP3. Almost every time I try to open Firefox I get the message:
"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 then must open Task Manager and find Firefox and stop the process.
I run Firefox on 4 Windows machines and this is the only machine that I have this problem on.
I have looked at the Mozilla Firefox KB and have tried to check on the items that could be causing the problem. I have update my Java in Firefox. I have un-installed Firefox leaving the Bookmark preferences, etc. on my machine, ran CCleaner to clean the Registry of remaining Firefox items and then re-installed Firefox - I still have the problem.
I have installed Google Chrome to fix this problem but now I find that several of the websites and companies I do business with are not compatible with Chrome.
How can I fix this problem? Why am I only having this issue on 1 of my 4 Windows machines?
Thanks!
Bill Artman

For possible causes see [[Firefox is already running but is not responding]].

When ever I click on a page in Firefox, I get the message that Firefox has stopped the loading of that page, with an "allow" box in the upper right corner of th

When ever i try to migrate to another page, the browser puts up a blank page with the message that Firefox stopped the loading of the page, and there is an allow button in the upper right corner of the blank page, which i have to click on, to get to the page i want to travel to.
is this normal, and how do i fix it?

can you try restarting Firefox in safe mode.
[[Troubleshoot Firefox issues using Safe Mode]]
Reply back to us.

When upgrading Firefox I get the message, "An older item named "Firefox" already exists in this location. Do you want to replace it with the newer one you're moving?". Choosing YES results in "Operation can't be completed because item "Firefox" in use."

Using Mac Snow Leopard 10.6.7
Current Firefox: 3.6.18
Trying to update latest version: 5.0.1
This seems quirky. In Updating a newer version of Firefox is should seem obvious that the existing firfox executable would be replaced by the newer version ?!?
Thanks for any help you can give.

If you have problems with updating or with the permissions then easiest is to download the full version and trash the currently installed version to do a clean install of the new version.
Download a new copy of the Firefox program and save the DMG file to the desktop
* Firefox 5.0.x: http://www.mozilla.com/en-US/firefox/all.html
* Trash the current Firefox application to do a clean (re-)install
* Install the new version that you have downloaded
Your profile data is stored elsewhere in the Firefox Profile Folder, so you won't lose your bookmarks and other personal data.
* http://kb.mozillazine.org/Profile_folder_-_Firefox

When I try to start Firefox, I get a message "Welcome to nginx!!" and then I can't do anything. How can I get rid of this?

Whatever this is makes the loading of Firefox very very long and then won't let me go to Google.. I have to go to bookmarks and find a Google one and go that that and then proceed to use Google. I have tried but can't seem to get rid of it. I really need help, this is driving me nuts.

Whatever this is makes the loading of Firefox very very long and then won't let me go to Google.. I have to go to bookmarks and find a Google one and go that that and then proceed to use Google. I have tried but can't seem to get rid of it. I really need help, this is driving me nuts.

When i log in to firefox i get the message TypeError: Components.classes[cid] is undefined do you know how to get rid of it

this only started after i reinstalled google toolbar

This issue can be caused by an add-on that isn't working properly.
Start Firefox in <u>[[Safe Mode]]</u> to check if one of the extensions 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
* https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

When I try to activate Firefox, I get the message that it's already running. I have to log out or restart to be able to activate it. I have tried updating and reinstalling, but to no avail. Any suggestions?

I have updated the program several times and today uninstalled it and reinstalled it again. The second time I used it, i was told it was already running, though I had closed my internet page. Any suggestions will be appreciated.

Your above posted system details show outdated plugin(s) with known security and stability risks.
*Next Generation Java Plug-in 1.6.0_15 for Mozilla browsers
Update the [[Java]] plugin to the latest version.
*http://java.sun.com/javase/downloads/index.jsp (Java Platform: Download JRE)

When I try to launch Firefox I get the message, "This operation has been cancelled due to restrictions in effect on this computer. Please contact your system administrator". The only way I can launch the browser is to re-install it every time.

I cannot find any obvious restrictions on the computer. In the Control Panel under Set Program Access and Defaults, Enable Access to This Program is checked.

See http://support.microsoft.com/default.aspx?scid=kb;EN-US;Q310049 You receive an error message when you click a hyperlink in Outlook (default browser)

I always get the message "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." on terying to run firefox

When I try to run Firefox I get the message "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."
No copy of firefox is running as far as I can tell. Restart and restoring system to 10 days ago did not help.
Uninstalling and downloading a new copy - but to not avail.

See:
* http://kb.mozillazine.org/Recovering_a_missing_profile
* http://kb.mozillazine.org/Profile_in_use
Do you still have a default profile?<br />
If not then delete the file [http://kb.mozillazine.org/profiles.ini_file profiles.ini] to make Firefox create a new default profile.
* C:\Documents and Settings\<user>\Application Data\Mozilla\Firefox\Profiles\<profile>\

I am unable to download firefox.i get a message telling me that my computer needs to restart to complete the uninstal i just did

MY ORIGINAL PROBLEM I WAS HAVING WITH FIREFOX IS THAT I WOULD GET A MESSAGE TELLING ME THE FIREFOX WAS RUNNING AND I NEEDED TO CLOSE FIREFOX OR RESTART MY SYSTEM.THERE WAS NOTHING RUNNING,BUT RESTARTED ANYWAYS.I DECIDED TO TRY AND UNINSTALL AND THEN REINSTALL.EVERYTHING WORKED WELL.THE PROBLEM SEEMED TO HAVE GONE AWAY.THE PROBLEM REAPPEARED AND THOUGHT I WOULD DO THE UNINSTALL AGAIN,AND THAT BRINGS ME UP TO CURRENT PROBLEM.EVERYTIME I TRY TO DOWNLOAD FIREFOX,I GET THE MESSAGE TELLING ME TO RESTART MY SYSTEM TO COMPLETE A PREVIOUS UNINSTALL.I HAVE TRIED DIFFERENT VERSIONS AND THEY ALL DO THE SAME THING.I WANT MY FIREFOX BACK!!!!I CAN'T EVEN THINK ABOUT HAVING TO GO BACK TO IE ANYTHING!

If you are getting repeatedly prompted to authorise your account then see if this page helps : http://support.apple.com/kb/TS1389

I cannot open my firefox broswer. The message box appeared that said a problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available. Under that there are debug and close program buttons.

I cannot open my firefox broswer. The message box appeared that said a problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available. Under that there are debug and close program buttons.

JackieMars71 I would recommend reviewing your installation log files to determine if there are any errors during the installation process. You can find information on how to locate and interpret your installation log files at Troubleshoot install issues with log files | CC - http://helpx.adobe.com/creative-cloud/kb/troubleshoot-install-logs-cc.html. You are welcome to post any specific errors you discover to this discussion.

After updating Firefox it will no longer open and i get the message "firefox.exe has encountered a problem and needs to close" end of story.

Firefox was working well. One day I logged on to use Firefox and was prompted to update my version which I did. After or during the update the following message was given on the screen "firefox has encountered a problem and needs to close". It closed and now every time I click on the firefox icon I get the same message from Microsoft. That is all the information I get. Each time I go to open Firefox I get the same message. There is an error message attached to the Microsoft dialog box, but I don't understand what it means.
I have sent it to Microsoft but no reply.

Make sure that you aren't running Firefox in some compatibility mode (e.g. [http://en.wikipedia.org/wiki/Rosetta_%28software%29 Rosetta]).

When I click onto the firefox webbrowser, I get the message "firefox has stopped working, windows will close the application to find a solution to the problem " This has been going on for several days, I've had to go back IE to access web pages

When I click onto the firefox webbrowser, I get the message "firefox has stopped working, windows will close the application to find a solution to the problem."

I had this exact same problem. I found this fix and it worked for me.
Step 1:
Browse to C:\Program Files (x86)\Common Files\Apple\Apple Application Support and copy the filen named QTMovieWin.dll.
Step 2:
Browse and past that file into C:\Program Files (x86)\iTunes.
Hope this helps you. I wish I could remember where I saw this originally so I could thank them.
Good Luck.
Anthony

Even after uninstalling, reinstalling Firefox, the Firefox profile folder is empty, and I get the message "Firefox is still running and not responding close firefox...

Even after uninstalling, reinstalling Firefox, the Firefox profile folder is empty, and I get the message "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 have followed all the directions I can find, on my computer and Firefox Support. Still, the same message comes up, and "firefox" is not shown in my Windows Task Manager.
What can I do?

Delete the profiles.ini file and let Firefox create a new default profile.
* http://kb.mozillazine.org/profiles.ini_file
* http://kb.mozillazine.org/Profile_folder_-_Firefox#Files_and_folders_outside_the_profile_folder

Hi, for the last week everytime i open firefox i get a message to download 36.0.4. I update firefox, restart an then the same message appears. What's going on?

hi, for the last week everytime i open firefox i get a message to download 36.0.4. I update firefox, restart an then the same message appears. What's going on? What can I do?

There is a new update available today for version 37, please do post back if this also happens for this update.
Please update to the most recent version of Firefox:
*[[Update Firefox to the latest version]]

Everytime I close a session of Firefox I get the message "FF is al actief, maar reageert niet..." I can close it with taskmanag. I already installed FF again

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