Before you open the Windows process, you need a JS routine to look at the device on the screen. It could put the information in a cookie for you. But it is a problem, because you do not own the files you want to find the information from.
This will take constant maintenance, because I happen to know that eBay changes the names and arrangements of things on the screen periodically, to prevent malware attacks on user's computers.
MidiMagic
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