function FindProxyForURL(url, host) {
    // Array of domains to bypass proxy (go DIRECT)
    var directDomains = [
        ".1e100.net",
        ".1rx.io",
        ".2mdn.net",
        ".33across.com",
        ".35.52.135",
        ".360cities.net",
        ".360gigapixels.com",
        ".3lift.com",
        ".8notes.com",
        ".a-mo.net",
        ".abcya.com",
        ".act-rapidreview-ondemand.kaptest.com",
        ".acuityplatform.com",
        ".ada.support",
        ".adaptv.advertising.com"
        // ... (all 700+ domains can go here, but testing with a subset first)
    ];

    // Construct regex pattern with ES5 syntax
    var escapedDomains = directDomains.map(function(d) {
        return d.replace(/\./g, "\\.");
    });
    var pattern = new RegExp("(" + escapedDomains.join("|") + ")$", "i");

    // Test if host matches any direct domain
    if (pattern.test(host)) {
        return "DIRECT";
    }

    // Internal network check
    if (isInNet(myIpAddress(), "10.0.0.0", "255.0.0.0")) {
        if (isResolvable("fctc-pdc.fcschools.net")) {
            return "DIRECT";
        }
    }

    // Internal FQDNs that bypass proxy
    if (dnsDomainIs(host, ".fcschools.net")) {
        return "DIRECT";
    }

    // Default: Send all other traffic to proxy with failover
    return "PROXY franklin-sec.zs.ncren.net:9443; PROXY franklin-pri.zs.ncren.net:9443";
}