Firefox crashes or runs but with splotches missing color, how do i fix it?

when I start firefox my desktop starts flashing on and off and when it returns there are splotches missing color. firefox then either crashes or runs but with the colors muted and images distorted.

Try to disable hardware acceleration.
*Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available"
If disabling hardware acceleration works then check if there is an update available for your graphics display driver.

Similar Messages

It always says:Firefox is already running but not responding; what can i do to fix this problem; it has only started after having downloaded the latest verion.

I downloaded the latest version of firefox and the problem has started; it aways says: "Firefox is already running, but not responding. To open a new window you must first close the existing Firefox process or restart your system; I have to do this about 3 times for the internet to come on again; what can I do, short of calling a technician??

Please read this article: [[Firefox is already running but is not responding]]

My website crashes Firefox 4.0.1 but not 3.6.17, how can I fix this? Or can Firefox 4.0.1 be fixed for this?

I am using Windows7 64 bit on my PC, plus I WAS using Firefox 4.0.1 very happily and enjoying the new tabs in groups etc, but I just discovered that '''''that''''' version of Firefox crashes when attempting to access any of my website's pages.
My Website: [http://www.franontheedge.com My Main Website] www.franontheedge.com
and [http://www.franontheedge.com/animation My Animation Website] www.franontheedge.com/animation
I discovered this when adding a new page to my website to display resource images for a challenge on Renderosity's Bryce forum. The page I added is this one:
[http://www.franontheedge.com/animation/stills_inspiration.html New Page added] http://www.franontheedge.com/animation/stills_inspiration.html
in order to continue working, including working with my website, I have had to uninstall Firefox 4.0.1 and re-install Firefox 3.6.12, which today wished to update itself to Firefox 3.6.17 - which I allowed it to do - checking that my website was still accessible from the updated 3.6.17 version - which it is.
I tried to update my plugins thinking that might be my 4.0.1 problem - but even after updating all my plugins, Firefox 4.0.1 still crashed every time I tried to go to my own website - this is very dispiriting!!!
I could maybe understand it if Firefox 4.0.1 crashed just on pages of my site with video on it, but it does it on pages with just images and text on it as well.
Is it possible to:
a) Install both Firefox 3.6.17 '''''AND''''' Firefox 4.0.1 on this my 64 bit Windows7 PC?
b) Fix Firefox 4.0.1 totally?
Is Firefox 4.0.1 a 32 bit system? or is it 64 bit?
I have program files for both 64 bit and 32 bit on this PC, and can run other 32 bit programs with no problems at all.
I have no problems accessing my website with Google Chrome either, nor with Opera, but I '''''liked''''' Firefox 4.0.1 - and would like to be able to go back to it, but I won't if my own website is not accessible on it.
Please can anyone help?

Hi BladedxRayne,
You should look at the article [http://kb.mozillazine.org/Preferences_not_saved Preferences not saved].
Hopefully this helps!

Firefox crashes whenever I open a session restore. How do i fix this?

So, I am a tab hoarder I will admit that upfront. I have lots of tabs saved. Restore sessions within restore sessions... quite a few of them. But today I tried going through my restore sessions and my browser crashed. I attempted a million things to fix it, but whenever i try and open the restore session it crashes firefox. I even tried taking the profile and moving it to a different computer to see if it would make a difference, but it didnt. Can you help me fix this please?

Hey, I apologize for the delay on this, please make a copy of the sessionrestore.js file before opening Firefox again. This will save the tabs that were in the previous session.
First try about:sessionrestore page with the sessionrestore.bak file.
Technical elaboration
"Firefox typically renames sessionstore.js to sessionstore.bak when starting up in a new session so sessionstore.bak contains your old session and a fresh sessionstore.js contains your new session. This means that normally there is only one previous session available at any given time. (Occasionally due to file locks or other rare problems, Firefox may create files named sessionstore-1.js, sessionstore-2.js, and so forth.) "
There are two things you can do the next time you open FIrefox: you can replace the sessionrestore.back file while it is closed first, or when you open it you can immediately go to History > Restore previous session.
Or a last resort, add hoc way of extracting the urls from the file is elaborated on in this forum thread [http://forums.mozillazine.org/viewtopic.php?f=38&t=622036&start=60]
For the meantime, this [https://addons.mozilla.org/en-US/firefox/addon/session-manager/ Session Manager Add on] helps save and restores sessions after crashes.
However, the issue with the crash seems to crash at a few places. There are 44 threads in some of them which just means it was starting each of those windows on the start up.

I changed Java settings and now Firefox crashes as it opens, even in safe mode; how can I fix this?

I was trying to change settings to access the comments section of Slate.com. Right or wrong, I changed a Java setting from -1 to 2. The setting was in about:config and I believe it involved some sort of max. As I cannot open anything, I am not sure.
When I made the change, firefox crashed immediately, Every time I have tried to reopen, even in safe mode, it immediately crashes again and will not reopen.

Hi pternagy,
Sorry you are having problems.
For future reference. Those of us that mess directly with about:config soon learn how to recover from mistakes and what it is sensible to backup. Occasionally backing up your entire profile for instance can be useful and would have probably given you a quick solution of copying over the file from that backup.
*[[Back up and restore information in Firefox profiles]]
Ok on to the subject of trying to get Firefox back as it was:
Find your profile and the file ''prefs.js'' and rename that. (The renamed file is a potentially useful backup.) Firefox is then forced to regenerate the file and will reset your preferences to the default. You can then re open and use Firefox. Next try to get it back to normal.
Trying to manually edit the file ''prefs.js'' is normally a bad idea. However if it is a single pref change it may be possible to directly edit the prefs.js file (whilst Firefox is closed) to get everything back to how it was before . You have the renamed file to work with. Probably best to test all this out in a new additional profile then you only break additional test profiles not working profiles essential to Firefox.
These articles should help you:
* http://kb.mozillazine.org/Prefs.js_file
* [[Reset Firefox preferences to troubleshoot and fix problems#w_solution-2-delete-firefox-preference-files]]_solution-2-delete-firefox-preference-files
*[[Profiles - Where Firefox stores your bookmarks, passwords and other user data#w_finding-your-profile-without-opening-firefox]]#w_finding-your-profile-without-opening-firefox
* http://kb.mozillazine.org/Using_multiple_profiles_-_Firefox
Please post back with how you get on and whether you need any extra help.
Good Luck.

Firefox crashes every time I try to print. How do I fix?

Firefox crashes every time I try to print.

In the address bar, type '''about:crashes'''<enter>.''' Note:''' If any reports do not
have '''BP''' in front of the numbers, click it and select '''Submit'''.
Using your mouse, '''mark''' the most '''resent 7 - 10''' crash reports, and
'''copy''' them. Now go to the reply box below and '''paste''' them in.

When I click on Firefox.exe I get error message Can't start Firefox.exe as js3250.dll missing. When I try to re-download Firefox I get message saying can't download because Firefox is already running, but it isn't. How and where can I get js3250.dll?

Why punish me for a few too many keystrokes by deleting what I have already entered below my question. You're becoming MS.

See these posts about the same problem:
*[/questions/798251]
*[/questions/823473]

Firefox crashes after I open with a message, oops how embarassing, and asks which applicaiton to keep open or start new session. I opt for new session and it crashs

For the past two weeks, firefox will will crash after I open it or not open at all but just flash on the screen and disappear. This happens when I open in Google or search on MSN or go to hotmail.

Not necessarily: rv:1.9.2.8 indicates a Firefox 3.6.8 version
*Mozilla/5.0 (X11; Linux i686; rv:1.9.2.8) Gecko/20100722 Firefox/4.0.1
You can check for a possibly corrupted user agent.
See:
*https://support.mozilla.org/kb/Finding+your+Firefox+version
*https://support.mozilla.org/kb/websites-say-firefox-outdated-or-incompatible
*http://kb.mozillazine.org/Resetting_your_useragent_string_to_its_compiled-in_default

When I use a GSI external antenna for WiFi I first get a message that "Firefox is already running but not responding etc", and then Firefox crashes. Can anyone help please?

Because of weak WiFi signal I need to use an external antenna (GSI USB wireless WIFI long range network adapter). My computer can see the signal clearly and shows that I am connected to the right network. But when I try to launch Firefox I get a message 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." When I click "OK" Firefox tries to load websites but gives up and reports "Problem Loading". It looks like Firefox is having trouble "seeing" the signal from the external antenna. What do I need to do please?

Try Ubuntu support, I don't think your problem is with Firefox - it will use the connection that the Operating System "makes". I'm a real noob with Ubuntu myself, and don't think I can help you figure out the problem.
http://ubuntuforums.org/

Firefox is already running but is not responding - Cannot run Firefox on multiple machines with in a network (parent.lock)

Environment - Single File Server & 6 workstations.
I have a single generic user account/profile and log on to all 6 workstations at the same time (1 user, 1 password, 6 workstations).
I need to run firefox on all the workstations with the same user and user profile.
However, as soon as one user opens firefox all the others get the message "Firefox is already running but is not responding" and can not open the browser. No other workstations can open Firefox. I can only run 1 instance of Firefox in this scenario. How can I run it on all 6 with a single user account?
I have been back to the server and deleted the parent.lock file but it is recreated again as soon as someone open a firefox browser and the problem starts al over again.
Please - How can I get a single user with a single profile to run firefox on 6 workstations simultaneously?
Thank You

hello timfarr, you cannot do that - many essential databases (like bookamrks, passwords etc.) in your profile are not designed to be accessed by different processes at the same time...

A week ago Firefox crashed and since then will not run on my computer. At first when I clicked on Icon on desktop a popup said Firefox was already running, but where was it? I couldn't find it anywhere. I uninstalled Firefox and downloaded Firefox 9.0.1.

Now when I click on either the desktop icon or Firefox in the program section, a little popup appears in the top left hand corner but there is nothing in it that I can click on to run Firefox

There may be a parent.lock file left in the Firefox Profile Folder because Firefox crashed.
*http://kb.mozillazine.org/Profile_folder_-_Firefox
See:
*https://support.mozilla.com/kb/Firefox+is+already+running+but+is+not+responding
*http://kb.mozillazine.org/Profile_in_use

When i go to sign on it says firefox is already running, but is not responding and to close exisiting FF process or restart system. Have used FF for years with no problems?

I have been using FF to acess the web for years but recently (within the last few days) I get the above message. I have deleted the ff I was using and downloaded the 3.6 again but continue to get the same message

Hopefully this support article is what you need:
https://support.mozilla.com/en-US/kb/Firefox+is+already+running+but+is+not+responding

After trying every suggestion and uninstalling & installing with clean copy. I still get firefox is already running, but is not responding. To open a new window

I have tried to restore to an earlier period. uninstalled then reinstalled mozilla, and restarted numerous times, but whenever I try to open the message Firefox is already running, but is not responding. To open a new window, you much first close the existing Firefox process, or restart your system.
Can use some advanced insight on this.

Try to use "Firefox > Exit" (Windows: Firefox/File > Exit; Mac: Firefox > Quit Firefox; Linux: Firefox/File > Quit) to close Firefox if you are currently doing that by clicking the close X on the Firefox title bar.
See:
*http://kb.mozillazine.org/Profile_in_use
*https://support.mozilla.org/kb/Firefox+is+already+running+but+is+not+responding

When I attempt to open firefox an error message appears telling me that firefox is already running, but I can't find it running. How do I do so or in any case close the already running Firefox process?

When I attempt to open Firefox instead of Firefox opening, an error message appears saying "Firefox is already running but isn't responding. To open another window please close the existing Firefox process or restart the system.", but I can't find that process of Firefox in order to kill it, and after restarting the system there is still the problem. I have found an emergency fix to at least get online, and that is to use"Firefox_Profile_Manager" in the start menu's "run" start menu, but the
Firefox that then opens is that one doesn't carry over what I had in my bookmarks but starts bookmarks anew.

Sounds like it is hanging when you exit and later try to restart Firefox.
* How to stop the running Firefox process
** In Task Manager, does firefox.exe show in the '''Processes''' tab?
** See: http://kb.mozillazine.org/Kill_application
**Windows 7 users: http://www.techrepublic.com/blog/window-on-windows/reap-the-benefits-of-windows-7s-task-manager/2576
* What may cause Firefox to hang at exit
**Windows 7 Task Manager: http://www.techrepublic.com/blog/window-on-windows/reap-the-benefits-of-windows-7s-task-manager/2576
** http://support.mozilla.com/en-US/kb/Firefox+hangs
** http://kb.mozillazine.org/Firefox_hangs
** https://support.mozilla.com/en-US/kb/Firefox+is+already+running+but+is+not+responding
* You may need to try Firefox Safe Mode
** You may need to use '''Safe Mode''' to locate the problem: ***See: http://kb.mozillazine.org/Safe_Mode
***Firefox 4 users, hold the Shift key while clicking the Firefox 4 desktop icon to enter Safe Mode.
***Firefox Safe Mode is a diagnostic mode that disables Extensions and some other features of Firefox.
****In Firefox 4, Safe Mode also disables Plugins and Hardware Acceleration.
****If you are using a theme, switch to the DEFAULT theme: Tools > Add-ons > Themes '''before''' starting Safe Mode (In Firefox 4, Tools > Add-ons > Appearance). See: http://support.mozilla.com/en-US/kb/Using%20themes%20with%20Firefox#w_managing-themes-and-personas
****When entering Safe Mode, do not check any items on the entry window, just click "Continue in Safe Mode".
****Test to see if the problem you are experiencing is corrected.
*** If the problem does not occur in Safe-mode then disable all of your Extensions and Plug-ins and then try to find which is causing it
***#by enabling '''one at a time''' until the problem reappears.
***#You can also enable a few at a time (3-5), keeping track of what you just re-enabled to see if the problem re-occurs; this will help narrow down the possibilities if you have a large number of add-ons.
***#'''You MUST close and restart Firefox after EACH change''' via File > Restart Firefox (on Mac: Firefox > Quit).
***#You can use "Disable all add-ons" on the Safe Mode start window.
**See the following for more information
*** http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes
*** http://support.mozilla.com/en-US/kb/Troubleshooting+plugins
*** http://support.mozilla.com/en-US/kb/Basic+Troubleshooting
 
 
'''You need to update the following:'''
*Adobe Shockwave for Director Netscape plug-in, version 11.5
*Adobe PDF Plug-In For Firefox and Netscape "9.3.2"
*Shockwave Flash 10.2 r153
*Next Generation Java Plug-in 1.6.0_17 for Mozilla browsers
#'''''Check your plugin versions''''' on either of the following links':
#*http://www.mozilla.com/en-US/plugincheck/
#*https://www-trunk.stage.mozilla.com/en-US/plugincheck/
#*'''Note: plugin check page does not have information on all plugin versions'''
#*There are plugin specific testing links available from this page:
#**http://kb.mozillazine.org/Testing_plugins
#'''Update Shockwave for Director'''
#*NOTE: this is not the same as Shockwave Flash; this installs the Shockwave Player.
#*Use Firefox to download and SAVE the installer to your hard drive from the link in the article below (Desktop is a good place so you can find it).
#*When the download is complete, exit Firefox (File > Exit)
#*locate and double-click in the installer you just downloaded, let the install complete.
#*Restart Firefox and check your plugins again.
#*'''Download link and more information''': http://support.mozilla.com/en-US/kb/Using+the+Shockwave+plugin+with+Firefox
#'''Update Adobe Reader (PDF plugin):'''
#*From within your existing Adobe Reader ('''if you have it already installed'''):
#**Open the Adobe Reader program from your Programs list
#**Click Help > Check for Updates
#**Follow the prompts for updating
#**If this method works for you, skip the "Download complete installer" section below and proceed to "After the installation" below
#*Download complete installer ('''if you do NOT have Adobe Reader installed'''):
#**SAVE the installer to your hard drive (save to your Desktop so that you can find it after the download). Exit/Close Firefox. Run the installer you just downloaded.
#**Use either of the links below:
#***https://support.mozilla.com/en-US/kb/Using+the+Adobe+Reader+plugin+with+Firefox ''(click on "Installing and updating Adobe Reader")''
#***''Also see Download link''': http://get.adobe.com/reader/otherversions/
#*After the installation, start Firefox and check your version again.
#'''Update the [[Managing the Flash plugin|Flash]] plugin''' to the latest version.
#*Download and SAVE to your Desktop so you can find the installer later
#*If you do not have the current version, click on the "Player Download Center" link on the "'''Download and information'''" or "'''Download Manual installers'''" below
#*After download is complete, exit Firefox
#*Click on the installer you just downloaded and install
#**Windows 7 and Vista: may need to right-click the installer and choose "Run as Administrator"
#*Start Firefox and check your version again or test the installation by going back to the download link below
#*'''Download and information''': http://www.adobe.com/software/flash/about/
#**Use Firefox to go to the above site to update the Firefox plugin (will also install plugin for most other browsers; except IE)
#**Use IE to go to the above site to update the IE ActiveX
#*'''Download Manual installers'''.
#**http://kb2.adobe.com/cps/191/tn_19166.html#main_ManualInstaller
#**Note separate links for:
#***Plugin for Firefox and most other browsers
#***ActiveX for IE
#'''Update the [[Java]] plugin''' to the latest version.
#*Download site: http://www.oracle.com/technetwork/java/javase/downloads/index.html (Java Platform: Download JRE)
#**'''''Be sure to un-check the Yahoo Toolbar option during the install if you do not want it installed.
#*Also see "Manual Update" in this article to update from the Java Control Panel in Windows Control Panel: http://support.mozilla.com/en-US/kb/Using+the+Java+plugin+with+Firefox#Updates
#* Removing old versions (if needed): http://www.java.com/en/download/faq/remove_olderversions.xml
#* Remove multiple Java Console extensions (if needed): http://kb.mozillazine.org/Firefox_:_FAQs_:_Install_Java#Multiple_Java_Console_extensions
#*Java Test: http://www.java.com/en/download/help/testvm.xml

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]].

Firefox crashes or runs but with splotches missing color, how do i fix it?

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