This doesn't require the flash plugin to work. It uses this as one of it's tests to see if you're flash capable, but it works without installing flash.
Note: This is a pretty sophisticated set of tests and takes over 10s to run (includes audio oscillator fingerprinting and installed fonts fingerprinting).
It's really interesting if you follow some of the techniques used by advertisers to fingerprint users who use adblock, etc.
This does not require flash to run, it's one of the facets of the fingerprinting run on your browser. What people seem to be missing is that this "common metadata" that is being shown to you is point. If someone really wanted to track your internet activities, all they would have to do is take a "fingerprint" or a capture of all this data, and note when you come to their website, or what websites you are visiting. The idea being that this simple technical information an be used to identify a device uniquely because rarely if every does the devices share characteristics in ALL of these technical facets.
It's not as simple as using ad-block and saying do not track and trying to be someone anonymous by using browser extensions, because there are creative ways to track you anyway.
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