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True Browser Fingerprint

Description: This function fingerprints the browser on the client's device by using feature detect rather than relying on the easy to spoof user-agent.

Issues: None. However if a browser is created that has trouble with calls to invalid features there could be issues.

Returns: The browser and in some cases a version number, or unknown if it cannot be found.

Entropy: TBD

Output for your computer is: 

function fingerprint_truebrowser() {
    "use strict";
    var strBrowser, strUserAgent, strOut;

    strBrowser = "Unknown";
    strUserAgent = null;
    strOut = null;

    strUserAgent = navigator.userAgent.toLowerCase();

	/* Checks for different browsers, cannot use Try/Catch block */
	if (document.all && document.getElementById && navigator.savePreferences && (strUserAgent.indexOf("Netfront") < 0) && navigator.appName !== "Blazer") {
		strBrowser = "Escape 5";
	} else if (navigator.vendor === "KDE") {
		strBrowser = "Konqueror";
	} else if (document.childNodes && !document.all && !navigator.taintEnabled && !navigator.accentColorName) {
		strBrowser = "Safari";
	} else if (document.childNodes && !document.all && !navigator.taintEnabled && navigator.accentColorName) {
		strBrowser = "OmniWeb 4.5+";
	} else if (navigator.__ice_version) {
		strBrowser = "ICEBrowser";
	} else if (window.ScriptEngine && ScriptEngine().indexOf("InScript") + 1 && document.createElement) {
		strBrowser = "iCab 3+";
	} else if (window.ScriptEngine && ScriptEngine().indexOf("InScript") + 1) {
		strBrowser = "iCab 2-";
	} else if (strUserAgent.indexOf("hotjava") + 1 && (navigator.accentColorName) === "undefined") {
		strBrowser = "HotJava";
	} else if (document.layers && !document.classes) {
		strBrowser = "Omniweb 4.2-";
	} else if (document.layers && !navigator.mimeTypes["*"]) {
		strBrowser = "Escape 4";
	} else if (document.layers) {
		strBrowser = "Netscape 4";
	} else if (window.opera && document.getElementsByClassName) {
		strBrowser = "Opera 9.5+";
	} else if (window.opera && window.getComputedStyle) {
		strBrowser = "Opera 8";
	} else if (window.opera && document.childNodes) {
		strBrowser = "Opera 7";
	} else if (window.opera) {
		strBrowser = "Opera " + window.opera.version();
	} else if (navigator.appName.indexOf("WebTV") + 1) {
		strBrowser = "WebTV";
	} else if (strUserAgent.indexOf("netgem") + 1) {
		strBrowser = "Netgem NetBox";
	} else if (strUserAgent.indexOf("opentv") + 1) {
		strBrowser = "OpenTV";
	} else if (strUserAgent.indexOf("ipanel") + 1) {
		strBrowser = "iPanel MicroBrowser";
	} else if (document.getElementById && !document.childNodes) {
		strBrowser = "Clue browser";
	} else if (navigator.product && navigator.product.indexOf("Hv") === 0) {
		strBrowser = "Tkhtml Hv3+";
	} else if (typeof InstallTrigger !== 'undefined') {
		strBrowser = "Firefox";
	} else if (window.atob) {
		strBrowser = "Internet Explorer 10+";
	} else if (XDomainRequest && window.performance) {
		strBrowser = "Internet Explorer 9";
	} else if (XDomainRequest) {
		strBrowser = "Internet Explorer 8";
	} else if (document.documentElement && document.documentElement.style.maxHeight !== "undefined") {
		strBrowser = "Internet Explorer 7";//xxxxx
	} else if (document.compatMode && document.all) {
		strBrowser = "Internet Explorer 6";//xxxxx
	} else if (window.createPopup) {
		strBrowser = "Internet Explorer 5.5";
	} else if (window.attachEvent) {
		strBrowser = "Internet Explorer 5";
	} else if (document.all && navigator.appName !== "Microsoft Pocket Internet Explorer") {
		strBrowser = "Internet Explorer 4";
	} else if ((strUserAgent.indexOf("msie") + 1) && window.ActiveXObject) {
		strBrowser = "Pocket Internet Explorer";
	} else if (document.getElementById && ((strUserAgent.indexOf("netfront") + 1) || navigator.appName === "Blazer" || navigator.product === "Gecko" || (navigator.appName.indexOf("PSP") + 1) || (navigator.appName.indexOf("PLAYSTATION 3") + 1))) {
		strBrowser = "NetFront 3+";
	} else if (navigator.product === "Gecko" && !navigator.savePreferences) {
		strBrowser = "Gecko engine (Mozilla, Netscape 6+ etc.)";
	} else if (window.chrome) {
		strBrowser = "Chrome";
    }
	strOut = strBrowser;
	return strOut;
}