I've just climbed out of another rabbit hole called chromeos! Seems that Linux only works in ChromeOS through the command line terminal and not through the graphical interface (which is just the Chrome browser). But the pscan website has the terminal commands you need.

But I still think your first problem is getting the Chrome web browser to download the actual pscanloader program. I suspect Chrome only wants to download from the Play/Chrome store. I haven't found information to change that.

Good luck. Chris 

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