When I close firefox and then try to reopen it later it often says that it cannot open firefox because it is already open and that I must close it before it can open a new window.

When I look at the task manager it is not listed at all. It will work if I restart my computer.

See "Hang at exit":
* http://kb.mozillazine.org/Firefox_hangs
* [[Firefox hangs]]

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I have downloaded and installed the latest version of numbers on my mac. Everytime I save and then try to reopen that document, I receive a message telling me that I need a new version of numbers. Also, when I try to sort the date column, it sorts out of

I have downloaded and installed the latest version of numbers on my mac. Everytime I save and then try to reopen that document, I receive a message telling me that I need a new version of numbers. Also, when I try to sort the date column, it sorts out of order. The last version sorted fine.

Welcome to Apple Support Communities
When you install the new iWork version, the old iWork version is kept, so it looks like you are opening your old version.
To fix this, open a Finder window, choose Applications in the sidebar and drag the new Numbers version to the Dock, so you can access to it quickly. Open all documents from this version. I don't recommend you to delete the old Numbers version in case you need it.
Respecting to the second question, you will get better answers in the Numbers for OS X forum

Firefox will not connect to internet after upgrade. The window pops up but shows "connecting " in tab. And then it sit there. Close it down and then try to reopen it and get message " Firefox already running, Exit program or shut down computer" ???

Firefox will not connect to internet after upgrade. The window pops up but shows "connecting " in tab. And then it sit there. Close it down and then try to reopen it and get message " Firefox already running, Exit program or shut down computer" ?????????????????

1st problem see http://kb.mozillazine.org/Firewalls
2nd problem, to close Firefox properly use File > Exit
:not with the [x] in upper right corner which close window
:see http://kb.mozillazine.org/Firefox_hangs#Hang_at_exit
:if restarting use "Restartless Restart" extension as mentioned there.
 Please mark "Solved" one answer that will best help others with a similar problem -- hope this was it.

When closing FF and then try to go back on, a msg. says FF is already running, but not responding, to open new window you must first close the existing window or restart system. How do i close without restarting?

'This happens after a FF session is ended and am back on my desktop screen. If I then try to go back online a message says that FF is already running but is not responding. To open a new session you must first close the existing process or restart your system. I have to restart the computer to before it allows me to go back on. How can I close the session and then open a new one without rebooting???

Hey GreenViking,
You can kill the process manually by right clicking in the task bar (next to the time and date) and opening the task manager.
[https://support.mozilla.com/en-US/kb/Firefox%20hangs#w_firefox-hangs-when-you-quit-it This article] has some information about Firefox hanging when you try to close it.
Hope that helps!

Once I turn off the browser and then try to use it later, I get a message saying its already running but not responding. tells me to close it which I cant do since its already closed. Forces me to restart my computer

Each time I start, use and close Firefox, when I try to use it the 2nd time, I get a message saying its already running but not responding. It Isn't. I have to restart my computer everytime I want to use Firefox.
== This happened ==
Every time Firefox opened
== I downloaded the new version ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; Win64; x64; SV1; GTB6.4; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)

'''Kill Application'''
In Task Manager, does firefox.exe show in the '''Processes''' tab?
See: '''[http://kb.mozillazine.org/Kill_application Kill Application]'''
'''Causes and solutions for Firefox hanging at exit:'''
'''[[Firefox hangs]]'''
'''[http://kb.mozillazine.org/Firefox_hangs#Hang_at_exit Firefox hangs at exit (Mozillazine article)]'''
'''[[Firefox is already running but is not responding]]'''
'''Safe Mode'''
You may need to use '''[[Safe Mode]]''' (click on "Safe Mode" and read) to localize the problem. Firefox SafeMode is a diagnostic mode that disables extensions and some other features of Firefox. If you are using a theme, switch to the DEFAULT theme: Tools > Add-ons > Themes before starting Safe Mode. 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.
See:
'''[[Troubleshooting extensions and themes]]'''
'''[[Troubleshooting plugins]]'''
'''[[Basic Troubleshooting]]'''
If the problem does not occur in Safe-mode then disable all of your extensions and then try to find which is causing it by enabling one at a time until the problem reappears. You have to 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.

Since the last update my Numbers app in IOS, iPad3 and iphone5 will not open. It works fine on my macbook pro. It starts but before I can open a file it closes.

Since the last update my Numbers app will not load in either my iPad3 or my iPhone5. It works fine on my MacBook Pro. The app starts but before I can open a file it closes. Is this a common problem and do you know hwo to solve it?

Hi Michael,
If you've already restarted both your iOS devices after the update and Numbers for iOS still won't load, you might try clearing the documents temporarily out of iCloud, opening the apps, closing them, and then placing the documents back in iCloud.
To do this, in Finder on your Mac, hold down the option key and then Go > Library > Mobile Documents > com~apple~Numbers. Move the documents there out to the Desktop or other location of your choosing. Then give iCloud time to sync. Then try opening Numbers on iPad and on the iPhone. If they open, then close them, and move the documents back into Library > Mobile Documents > com~apple~Numbers and let iCloud sync again.
That sometimes clears up the problem.
SG

When I close Firefox (3.6.10) by using the x in upper right and then try to start it later, I get message FF is running, you must close first..which I thought I did. Cannot start without using Windows Task Manager and closing process. What is wrong?

See original question. Firefox apparently doesn't close when using the x in upper right corner as when I try to start it again I get a message that FF is already running and I must close it first. I thought the x would do that. Is something set wrong or corrupted?
Thanks

See "Hang at exit":
* http://kb.mozillazine.org/Firefox_hangs
* [[Firefox hangs]]

When I close Firefox and then try to reopen it cannot and says Firefox is still running

If I try to reopen Firefox after closing the application, I receive a message that it cannot open because " Firefox is still running"
I am operating with Vista Premium 64bit
My only solution is to restart my computer.

Your above posted system details show outdated plugin(s) with known security and stability risks that you should update.
*Java Plug-in 1.6.0_13 for Netscape Navigator (DLL Helper)
Update the [[Java]] plugin to the latest version.
*http://java.sun.com/javase/downloads/index.jsp (Java Platform: Download JRE)

If I close a session on Firefox and then try to reopen it, I get a screen that says "you must close your current session because Firefox is already running".

The power went out and when it came back on, my computer seemed fine. I was able to access the internet through Firefox as usual. However, if I closed my session and tried to reopen it, it would say that there was already a session open and that I would have to close it before trying again. I would have to go to the task manager and find Firefox in the list of processes and end the process in order to get back to the internet. I have tried restarting my computer twice. What could be the problem?

Try to wait a bit longer before reopening Firefox to give Firefox more time to close completely. 
You can also try to use Firefox/File > Exit to close Firefox.
See "Hang at exit":
*http://kb.mozillazine.org/Firefox_hangs
*https://support.mozilla.com/kb/Firefox+hangs
See also:
* http://kb.mozillazine.org/Profile_in_use
* https://support.mozilla.com/kb/Firefox+is+already+running+but+is+not+responding

Everytime I close Firefox and then try to reopen it, it says that I am unable to do so as Firefox is already running (even though it's closed) and I have to restart my laptop all the time.

For about a week now when I have closed Firefox down then I try to reopen it the screen message states that Firefox is already running and I have to restart my laptop every time. This is becoming very frustrating and time-consuming.

I have the same problem on my notebook but I don't restart. Just do the control, alt, delete and bring up your task manager. Then scroll down to Firefox, end process and close. Now you should be able to restart FF. Not a fix but better than having to restart your laptop.

Sometimes when I close Firefox and then try to reopen, I get a message that "Firefox is still running" and suggests I close it (which I have already done) or restart my computer, what do I do?

I really have had a problem with Firefox responding sluggishly for the last 6 months or so. I have difficulty opening it, closing it properly, freezing up. I don't have this problem with other programs, so don't know what is going on. Also I can't use my latest version....10 of Adobe Acrobat now. Dont know if that is my computers fault or Firefox. Any help will be appreciated.

See "Hang at exit":
* http://kb.mozillazine.org/Firefox_hangs
* [[Firefox hangs]]

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When I save a pages document as a pdf and then try to email the document, it loads as an application octet-stream dat file instead of a pdf. What's happening?

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I got that message yesterday. I'm new at this so don't know if this is the correct solution but it worked for me. I reset my iPod by holding the 2 buttons down until the apple appears AND I restarted my computer. After that everything worked.

When I close firefox and then try to reopen it later it often says that it cannot open firefox because it is already open and that I must close it before it can open a new window.

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