[johnisgood]

How effective is it at "un-anonymizing" me? I value privacy. What do you think I can do about "any" of this?

[Retr0id]

It tends to identify your platform/browser version, with relatively low granularity. Unless you have an unusually rare OS/browser config, it won't deanon you on on its own. But it can be combined with other fingerprinting vectors.