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by ddebernardy 2852 days ago
Couldn't a browser do that without necessarily revealing the list of fonts?

    if (!isFontAvailable(font)) {
      downloadFont(font);
    }
It's not like a tracking script is going to try to iterate over every single existing font out in the wild for finger printing purposes. Doing so would be too easy to detect and block at the browser level. In the meanwhile, a script can get the list of fonts directly.