I experience a kernel panic whenever I close firefox and have to hard reboot my machine.

I am running Mac OS X 10.7.4 and Firefox 15.0.1 on a Macbook Pro 9,1. Almost every time I close firefox, the computer freezes completely and/or has a kernel panic, and in all situations I have to hard-reboot the machine. I've tried uninstalling other 3rd party apps and have sourced the problem to firefox. When I view the system report of the crash after rebooting, it says that the source of the crash was from a firefox process and something related to Nvidia Geforce. I was wondering if this may be related to the graphics switching on the new macbooks (I have a intel 4000 + a Nvidia 650m), however, I still get crashes when I turn off automatic graphics switching. My other thought was perhaps this problem has to do with hardware acceleration. Unfortunately, I tried disabling hardware acceleration in firefox and it still caused the computer to crash.
I'm happy to hear any suggestions! I don't want to have to switch to another browser, but using firefox 15 in its current state has made my computer unstable and unusable.

Which is it, hanging or crashing, or both?
* https://support.mozilla.com/en-US/kb/Firefox%20hangs#w_hang-at-exit
* http://kb.mozillazine.org/Firefox_crashes
* https://support.mozilla.org/en-US/kb/Firefox%20crashes

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Whenever I close firefox and start it up again it stays in the same spot. It's nice when my computer has problems, but when I just want to start a new session it gets tedious. What do I do about this?

When I close my browser and open it up again it starts from the exact same place, which would be troublesome if i was doing online banking for example. If I close on a page it opens back up to the same page again.

Try changing your startup option to your home page or a blank tab here:
orange Firefox button ''or'' Tools menu > Options > General > "When Firefox starts"

Keep getting this 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." , but cannot view Firefox open window or close it. Have to always reboot system.

Keep getting this 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." However, cannot view open window or close Firefox. Have to always reboot system to access the internet.

For possible causes of this error, and how to troubleshoot it see [[Firefox is already running but is not responding]].

Kernel panics whenever RAID card conditions battery

I have an early 2008 Mac Pro running 10.5.8, with an Apple RAID card with M-2.0.5.5 firmware. This has two Seagate Barracuda drives attached, formatted as RAID 0, and this RAID 0 is the OS drive.
Periodically, the RAID card conditions the battery. In the past I've been able to work while this was happening but, about three weeks ago, the conditioning started and the computer became completely unusable: there were kernel panics every minute or two and, on restarting, the report showed "AppleRAIDCard Controller Panic...". I eventually gave up and left it alone until the conditioning finished, and it's worked fine since.
This situation has just started again. It's only three weeks since the last conditioning; the gap was 6 weeks last time; and 12 weeks the time before that. Is the battery failing? Does that explain the constant AppleRAIDCard Controller-initiated kernel panics?
I didn't set up this computer and could happily live without RAID but this OS drive now has lots of software installed, much of which needed to be authorised by challenges/responses and explanations to software manufacturers as to why it was being reinstalled etc. Reformatting and reinstalling everything again would be a major PITA.
Is it possible to move the drives to a software RAID 0 without reformatting them? Is this likely to be less problematic than the Apple RAID card?
Thanks in advance,
Steve = : ^ )

I'd just like someone to comment on whether they think the battery alone could be responsible for unending KPs whenever the controller is conditioning the battery, or whether the card might be faulty.
I wonder about both points.
Did some searching, and there are several reports of other users with battery problems.
For some, the battery fixed the problem, for others, no remedy.
One example:
http://forums.macrumors.com/showthread.php?t=439873
For troubleshooting, identifying the source through eliminating causes related to the symptoms would be a reasonable approach.
Since the KP's occur only during battery conditioning, it places the most suspicion on the battery.
Personally, I see this as most telling.
Since you can't run without the battery, a replacement is the only way that I can think of to test the battery.
Other possibilities could be firmware related.
Is the card and the MP running the most current firmware?
If the firmware of the card and the MP are up to date, the battery, again, comes to the top of the suspect list.
And, of course, there is always the possibility that a component on card has failed.
Unfortunately, as with the battery, a replacement is needed to test.
I wouldn't move on this point until the battery theory were tested.
Not to dismiss the potential for software involvement, I'm wondering what are the OS X kexts that are involved with the processes leading to the KP's?
Logs in Console may provide some information.
Portions of the KP report immediately after the word "backtrace" also provide the best information.

I have my settings correct, but my app tabs, or previous session tabs STILL disappear whenever I close Firefox. Help?

1. I have a basic MacBook.
2. I'm running Mac OS X Version 10.6.8.
3. Under Firefox, I have my preference settings set on "When Firefox starts 'show my windows and tabs from last time'."
4. I have privacy settings set to "Tell websites I do not want to be tracked." and "Firefox will remember history."
Whenever I close Firefox (by clicking on the red dot at the top of the window OR by clicking 'quit Firefox' from the menu) and reopen it, it shows only my home page.
None of my tabs are saved - including the new app tabs (which sounded like something I'd like!) I don't have any trouble pinning the app tabs, but they don't stick. Or pin, that is. :) Nor can I get a restored browsing session.
This is something I can live with, but it's frustrating. Any suggestions?
Wendy

'''''"I cannot get Tabs from previous session back when I reopen Firefox"'''''
Be sure that you are not using Private Browsing or are in permanent Private Browsing mode. See: https://support.mozilla.com/en-US/kb/Private%20Browsing (2nd and 3rd menu items on that page)
Be sure you are not clearing history during a session or when closing Firefox. See:
*Clear Recent History: https://support.mozilla.com/en-US/kb/Clear%20Recent%20History
*Clear History when Firefox closes: un-check "Clear history when Firefox closes" on Options > Privacy panel (the first item under "History" on that panel must be set to "Firefox will: Use custom settings for history" to see that item to un-check)
'''''"there is no Firefox Tab at the top of my open Firefox window - only a menu bar"'''''
The Firefox button is supposed to be on by default only in Vista and Windows 7.
In Firefox 4, you have your choice of using the Firefox button (orange or gray) in the upper left corner or the Menu Bar (''File, Edit, View, History, Bookmarks, Tools. Help'').
*The selections on the Firefox button are different from the selections on the Menu Bar.
*You can easily switch back and forth between the Firefox button and the Menu Bar or leave one or the other active.
*The one being used depends on whether Menu Bar is checked
**Menu Bar '''checked''' = Menu Bar '''on''', Firefox button '''off'''
**Menu Bar '''un-checked''' = Menu Bar '''off''', Firefox button '''on'''
When the Firefox button is displayed and '''you want to ''temporarily'' display and use the Menu Bar''', pressing the ALT or F10 key will display the Menu Bar and you can make your selections from the temporarily displayed Menu Bar.
To check (or un-check) Menu Bar, do one of the following:
*using Firefox button: click Firefox button > Options > Menu Bar
*using the Menu Bar: click View > Toolbars > Menu Bar
*HOLD down the ALT key while pressing the keyboard letters VTM

When I close Firefox and then come back to it layer a box comes up that says it's already running. It ays to close Firefox first but when I hit close nothing happens and the box comes up again. I have to shut down my computer and restart to get into Firef

When I close Firefox and then come back to it later a box comes up that says it's already running. It says to close Firefox first but when I hit close nothing happens and the box comes up again. I have to shut down my computer and restart to get into Firefox again. If I can't get this fixed I will start using someone else. Someone told me a way to close Firefox but I forgot what they said.
== This happened ==
Every time Firefox opened
== a couple of months ago

Hello Brian.
You don't need to restart your computer to open Firefox again: you just need to close it manually through your application manager (CTRL+SHIFT+ESC in Processes tab). Anyway, hopefully this support article is what you need:
http://support.mozilla.com/en-US/kb/Firefox+hangs
What's probably happening is that you may be 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 coming from 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] and select ''Disable all add-ons''. 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 theme. You can troubleshoot plugins the same way.
If you want support for one of your add-ons, you'll need to contact its author.

When I close Firefox and then try to open it, it says it is already running and I have to close it which I can't do. The only way to open it is to first restart my computer which is a pain. If I can't fix this I will use an other brouser!

I am not sure what more I can tell you. I close firefox. So when I click on the icon it should allow me to open it again but I get a message that says it is already running. Either close it out which I can't do since I already did that or restart the computer.

Try holding control, alt and delete down in succession and then a dialogue box will appear with windows task manager. Once open click on the Processes Tab and look for firefox.exe. Highlight this and then click end process. It should come up with a warning but just click Yes. This should then close firefox and allow you to reopen it from your desktop without shutting down your computer. Hope this helps.

When i close firefox and want to use it later i get a warning saying cannot open firefox close it first this keeps happening all the time any ideas to solve this problem? i have 2 mchines one on xp and one on windows 7

i have 2 pcs one with xp and the other with windows 7 heres the problem
when i close firefox and say go back to it say in 10 mins i get a error message saying to close firefox before opening!!! but firefox window is closed but the processes still say its running in task manager so to correct this i have to end process on firefox. this seems to be happening now every time in the last few days i have upgraded firefox to the latest version. any ideas on how to solve this problem.

see if this helps you : [https://support.mozilla.org/en-US/kb/Firefox%20is%20already%20running%20but%20is%20not%20responding Firefox is already running but is not responding]
thank you
Please mark "Solved" the answer that really solve the problem, to help others with a similar problem.

Can't open Firefox. When I try to open, a window pops saying "Close Firefox" and "A copy of Firefox is already open. Only one copy of Firefox can be open at a time.", and doesn't allow the application to open.

Came home to find computer restarted, which I assume is an automatic Firefox update.
When I try to open Firefox, window pops up saying "Close Firefox" and, "A copy of Firefox is already open. Only one copy of Firefox can be open at a time."
I'm unable to open the program at this time, lots of critical work info stored there - please help. Thx.
Neal

See "Hang at exit":
*http://kb.mozillazine.org/Firefox_hangs
*https://support.mozilla.com/kb/Firefox+hangs

Sometimes when I close Firefox and try to open it in few moments it shows me 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." However, I haven't o

Sometimes when I close Firefox and try to open it in few moments it shows me 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." However, I haven't opened any additional Firefox related programs, and previous Firefox is closed. First I though it is because of my computer, but then I discovered that other people have the same problem as well
== This happened ==
A few times a week
== some 2 month ago ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.5.30729; InfoPath.2; .NET CLR 3.0.30729)

Hi Andis.
First of all, this is completely normal behavior, although it's a bit irritating, I know. What happens is that when you close Firefox, despite the window disappearing right there and then, Firefox keeps running for a little bit until the whole closing procedure is completed. This can take a fraction of a second on fast computers, or can take a few seconds on slow computers or when Firefox is storing a large session (if you save your tabs). All you have to do is wait a bit until Firefox closes, and then open it again.
To see if it's still running, you can press CTRL+SHIFT+ESC and then, under the Processes tab, you can see if firefox.exe is still there. If it's taking an unusual amount of time to close (which happens very rarely, and only if the browser freezes on exit), you can force the application to terminate from this application (task manager).
Firefox 4.0 will reduce by 97% the time it takes firefox.exe to close, so this problem will be basically erased for Firefox's next version.
Until then, I can recommend you this extension, which helps you restart your browser more easily and without bothering about closing times:
https://addons.mozilla.org/en-US/firefox/addon/3559/
Hopefully this will help.

After I close Firefox and then return to open it my computer says that it is still running and needs to be closed or the system restarted. How do I resolve this?

Question
After I close Firefox and then return to open it my computer says that it is still running and needs to be closed or the system restarted. How do I resolve this? edit

See this - [https://support.mozilla.com/en-US/kb/Firefox%20hangs#w_firefox-hangs-when-you-quit-it Firefox hangs when you close it]

Firefox is freezing. When I close Firefox, and try to re-start it, it will not open. I need to access Task Manager, where I find Firefox still running. I close Firefox in Task Manager & can re-start Firefox.

Firefox is freezing in the middle of a browsing session. When I close Firefox, and try to re-start it, it will not open. I need to access Task Manager, where I find Firefox to still be running. Once I close Firefox in Task Manager, I can re-start Firefox. This can happen several times in the space of a few hours? I'm running Vista Home premium with Firefox 3.6.16, and this problem has only started in the last 4 weeks. Can Anyone Help? Core 2 Duo E7300 with 4GB RAM.

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 11.0
*Shockwave Flash 10.2 r152
#'''''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 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

I close firefox and when I try to open it later, a pop-up says it is still running and I have to restart my pc?

I close firefox and when I try to open it later, a pop-up says it is still running and I have to restart my pc? tried closing Firefox down but Task manager says it is NOT running even though the window that pops up says it is still running??

When you go to task manager, go to the "processes" tab, right click on "firefox.exe," and select "end process tree." In the picture I've attached, I'm using windows 8, so the UI is a little different, but I hope it points you in the right direction.

When I close Firefox and open another instance of it to look at a new site I get a pop up window telling me Firefox hasn't shutdown yet.

When I close Firefox and open another instance of it to look at a new site I get a pop up window telling me Firefox hasn't shutdown yet. I am aware of tabs, but I prefer to just open new windows.
Do I really need a pop up window telling me that I just closed Firefox? Is there a way to disable it in options? I can't even use Buzof program to auto click for me. I've never had this issue with any other browser and I find it incredibly annoying.

I am not clear what you mean by:
''the program will only alow 1 website for each time I boot my machine,''
Are you talking about Firefox or something else in the above statement. Firefox will, or should allow you to open quite a few tabs at startup if you wish, although it will be faster the fewer that you do open.
When you say
''I close it the program does not completely close ''
Again what is happening, what error messages if any do you see, and what exactly makes you think Firefox is not closing properly.
Presumably you have already clicked on the blue links in my first post and read those articles.

I open facebook or other site. right click link/photo to open in new tab quickly. Then all tab connection will be connection to website, all page stop loading. Have to close firefox and reopen then only site will load.

I open facebook or other site. right click link/photo to open in new tab quickly. Then all tab connection will be connection to website, all page stop loading. Have to close firefox and reopen then only site will load.

You can override how links are opened via the browser.link.open_newwindow.override pref.
*http://kb.mozillazine.org/browser.link.open_newwindow
*1: current tab; 2:new window; 3:new tab;
Use this for links opened via JavaScript.
*http://kb.mozillazine.org/browser.link.open_newwindow.restriction
See also:
*http://kb.mozillazine.org/Prevent_websites_from_disabling_new_window_features

I experience a kernel panic whenever I close firefox and have to hard reboot my machine.

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