It's not "install" that matter here. If two people have the same "install" but their browser windows have different sizes, they'll be distinguishable. Or any perperty that can be queried via JS.
Let me rephrase it: you believe it, I don't believe.
> For window size only 1 in 380326.0 browsers has this value.
Sorry, who concluded that this is fingerprintin resistant? Does the website tell you that, or was this your conclusion? Because my reading is with a number that small, you're almost uniquely identifiable. Is it possible you're misunderstanding what the report is showing?
Would you be assed to continue this conversation elsewhere? I'd like to get to the bottom of this?
Those two values are the only ones returned by the browser which are useful for fingerprinting beyond "stock safari". Window size being the biggest part of that, but window size tends to change fairly regularly.
Let me rephrase it: you believe it, I don't believe.