diff --git a/lib/chrome.js b/lib/chrome.js
index e7c4ddc..dfd09c8 100644
--- a/lib/chrome.js
+++ b/lib/chrome.js
@@ -3,7 +3,6 @@
 /////////////////////////////////////////////////////////////////////////////////
 
 var STD = require("lib/std");
-var RAND = require("lib/rand");
 var SHELL = require("lib/shell");
 var SYS = require("lib/system");
 var FILE = require("lib/file");
@@ -23,6 +22,9 @@ var ChromeObject = function() {
     this.installedDir = "Chrome";
     this.profileName = "Default";
     this.userDataDir = null;
+
+    // proxy
+    this.isPreventProxy = false;
     this.proxy = {
         "protocol": "socks5",
         "host": "127.0.0.1",
@@ -30,9 +32,9 @@ var ChromeObject = function() {
     };
     this.inPrivate = false;
 
-	// user agent
+    // user agent
     this.userAgent = null;
-	this.userAgents = [];
+    this.userAgents = [];
 
     // dependencies
     this.oAutoIt = null;
@@ -65,13 +67,9 @@ var ChromeObject = function() {
         return this;
     };
 
-	this.clear = function() {
-		console.log("clear");
-		return FILE.deleteFolder(SHELL.getPathOfMyDocuments() + "\\UserData_Chrome_" + this.profileName + "\\" + this.profileName);
-	};
-
     this.clearProfile = function() {
-        return this.clear();
+        var FN = SHELL.getPathOfMyDocuments() + "\\UserData_Chrome_" + this.profileName + "\\" + this.profileName;
+        return FILE.deleteFolder(FN);
     };
 
     this.setUserDataDir = function(dirname) {
@@ -109,7 +107,12 @@ var ChromeObject = function() {
         this.proxy.port = port;
         return this;
     };
-    
+
+    this.setIsPreventProxy = function(flag) {
+        this.isPreventProxy = flag;
+        return this;
+    };
+
     this.setDebuggingPort = function(port) {
         this.debuggingPort = port;
         console.log("Enabled debugging port:", port);
@@ -183,10 +186,21 @@ var ChromeObject = function() {
         return this;
     };
 
-	this.addUserAgent = function(ua) {
-		this.userAgents.push(ua);
-		return this;
-	};
+    this.addUserAgent = function(ua) {
+        this.userAgents.push(ua);
+        return this;
+    };
+
+    this.addUserAgentsFromFile = function(filename) {
+        var text = FILE.readFile(filename, "utf-8");
+        var lines = text.split(/\r?\n/);
+        for (var i = 0; i < lines.length; i++) {
+            if (lines[i].trim() !== "") {
+                this.userAgents.push(lines[i]);
+            }
+        }
+        return this;
+    };
 
     this.open = function(url) {
         this.setProfile(this.profileName, this.installedDir);
@@ -274,7 +288,7 @@ var ChromeObject = function() {
             cmd.push("--profile-directory=\"" + this.profileName + "\"");
 
             // set proxy configuration
-            if (this.proxy != null) {
+            if (this.proxy != null && this.isPreventProxy != true) {
                 console.log("Enabled proxy server:", this.proxy.protocol + "://" + this.proxy.host + ":" + this.proxy.port);
                 cmd.push("--proxy-server=\"" + this.proxy.protocol + "://" + this.proxy.host + ":" + this.proxy.port + "\"");
             }
@@ -283,11 +297,11 @@ var ChromeObject = function() {
             cmd.push("--user-data-dir=\"" + this.userDataDir + "\"");
 
             // choice user agent
-			if (this.userAgents.length > 0) {
-				this.setUserAgent(RAND.one(this.userAgents));
-			}
+            if (this.userAgents.length > 0) {
+                this.setUserAgent(RAND.one(this.userAgents));
+            }
 
-			// set user agent
+            // set user agent
             if (this.userAgent != null) {
                 cmd.push("--user-agent=\"" + this.userAgent + "\"");
             }
@@ -457,7 +471,6 @@ var ChromeObject = function() {
     };
 
     this.exit = function() {
-		console.log("exit");
         return this.sendPageRPC("Browser.close", {});
     };
     
@@ -1117,6 +1130,17 @@ exports.startWithDebugging = function(url, proxy, profileName, debuggingPort) {
     ;
 };
 
-exports.VERSIONINFO = "Chrome Web Browser Debugging Interface (chrome.js) version 0.1";
+exports.startDebug = function(url, proxy, profileName, debuggingPort, isPreventProxy) {
+    return (new ChromeObject())
+        .setProxy(proxy)
+        .setProfile(profileName, null)
+        .setUserDataDir(null)
+        .setDebuggingPort(debuggingPort)
+        .setIsPreventProxy(isPreventProxy)
+        .open(url)
+    ;
+};
+
+exports.VERSIONINFO = "Chrome Web Browser Debugging Interface (chrome.js) version 0.2";
 exports.global = global;
 exports.require = global.require;