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Moving to new computer, copied profile not recognized

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Setting up a new Win10 machine, and trying to copy Firefox profile from old Win7 machine. First, I located the profile(s) on the old machine at:


Next, I copied (via network share) the file '2m1b67pe.<username>' to the new machine, at


Next, I opened 'run' and executed 'firefox -p'.

When it opened, it only listed the default profiles, 'default' and 'default-release'.

So how do I get it to recognize the profile I copied?