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I have been running Firefox ver. 22 32bit in Ubuntu 12.04 LTS 64-bit with no problems.

I don't run Firefox from the repositories. I downloaded the .tar.bz2 file and extracted it in my home directory, then created a desktop shortcut. Ubuntu 12.04 LTS 64-bit requires ia32-libs for the 32-bit Firefox to start. I have absolutely no problems.

But, today I downloaded the 64-bit version of Firefox 22. I removed the 32-bit version of Firefox, along with the .mozilla folder. I then extracted the Firefox 64-bit .tar.bz2 to my home directory and created a desktop shortcut. Firefox started okay the first time. But, when I closed it and tried to start it again, a window pops up and says Firefox is already running. I have to go to System Monitor and kill the Firefox process. Then it will start.

Can't figure out what the problems is, Any ideas?

Thanks.

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a plugin might cause this. –  Shaharil Ahmad Sep 7 '13 at 7:47
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