No. Anything that transfers account information, even just the name, remotely is not allowed in an addon. You could use cookies to store a list of locations locally and not linked to specific account names, but you can't use that information in the addon to add functionality.
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Computing the probability that at least one of the following events will occur:
P(a or b ... or z) = 1 - P(!a and !b ... and !z)
Probability
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