Can't open Firefox : I get a window saying another copy of firefox is open . MAC OS10.6.4 , which is not the case . MAC OS 10.

I F I WANT TO OPEN FIREFOX A WINDOW POPS TELLING ME THERE IS ANOTHER COPY OF FIREFOX ALREADY OPEN AND I CAN'T GET TWO COPIES OPEN AT THE SAME TIME . I DELETED FIREFOX AND DOWNLOADED AGAIN , TO NO AVAIL. THE MESSAGE POPS OUT EVERY TIME I WANT TO OPEN FIREFOX .

See [[Firefox is already running but is not responding]] and http://kb.mozillazine.org/Profile_in_use for common causes and solutions.

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When i try to open firefox, I get a message saying another copy is already running. I have tried shutting down comletely and computer still thinks there's another copy running. How can this be?

There are two separate desktops on this computer, one for me and one for another user. Her Firefox is not affected. I have looked everywhere for this second copy supposedly running but I don't see how it can be because I have shut down all programs several times.

There are a few possible causes for that error, for details see [[Firefox is already running but is not responding]].

When I try and launch Firefox, I get this error message A copy of Firefox is already open. Only one copy of Firefox can be open at a time." and have tried all of the trouble shooting tips, can you help?

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See [[Firefox is already running but is not responding]], the image shown in that article is the Windows equivalent of the error message that you are receiving, but the information relates to the Mac.

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

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I have tried to download and run Firefox on my MAC OS 10.6.7 several times and have run into this error message every time:
"A copy of Firefox is already open. Only one copy of Firefox can be open at a time". A search through the computer does not fine another copy of Firefox and there is no window open or evidence of the program open.
When I got this computer a year ago I copied the hard drive from the old computer onto the new and the old computer had a copy of Firefox on it and the program worked on that computer. It would not run on the new computer so I thought maybe it was due to the Intel chip so I deleted the program and downloaded the newest version at the time. This is when I started getting the error message and subsequent attempts have yielded the same results.
Can you be of help?

See:
* https://support.mozilla.com/kb/Firefox+is+already+running+but+is+not+responding

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The size of the message you are trying to send exceeds a temporary size limit of the server. The message was not sent; try to reduce the message size or wait some time and try again. The server responded: 4.5.3 Your message has too many recipients. For more information regarding
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See:
* https://support.mozilla.com/kb/Firefox+is+already+running+but+is+not+responding

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== This happened ==
Every time Firefox opened
== I installed Firefox ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.0.30729; .NET CLR 3.5.30729)

Start Firefox in [[Safe Mode]] to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
See [[Troubleshooting extensions and themes]] and [[Troubleshooting plugins]]
If it does work in Safe-mode then disable all your extensions and then try to find which is causing it by enabling one at a time until the problem reappears.
You can use "Disable all add-ons" on the ''Safe mode'' start window.
You have to close and restart Firefox after each change via "File > Exit" (on Mac: "Firefox > Quit")

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Can't open Firefox : I get a window saying another copy of firefox is open . MAC OS10.6.4 , which is not the case . MAC OS 10.

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