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When trying to download & install Firefox 5.0.1 into a Mac, I get a message saying that Firefox cannot be installed because libnsscksi.dylib is in use. Any idea how to locate and close that file? Finder does not recognize it. Thanks!

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Tried to install both Firefox 5.0 and 5.0.1, and received the same error message that a file ending in .dylib was in use. I cannot locate that file, and Finder does not recognize it.

Tried to install both Firefox 5.0 and 5.0.1, and received the same error message that a file ending in .dylib was in use. I cannot locate that file, and Finder does not recognize it.