fix download manager and upgrade nuget format

src/App.config

@@ -1,10 +1,5 @@
 <?xml version="1.0"?>
 <configuration>
   <appSettings>
-    <add key="torConfigurationFile" value=""/>
-    <add key="torControlPassword" value=""/>
-    <add key="torControlPort" value="9051"/>
-    <add key="torDefaultConfigurationFile" value=""/>
-    <add key="torPath" value="Tor\Tor\tor.exe"/>
   </appSettings>
 <startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6"/></startup></configuration>

src/Handlers/DownloadHandler.cs

@@ -2,7 +2,7 @@
 
 namespace SharpBrowser {
 	internal class DownloadHandler : IDownloadHandler {
-		MainForm myForm;
+		readonly MainForm myForm;
 
 		public DownloadHandler(MainForm form) {
 			myForm = form;
@@ -18,19 +18,17 @@ public void OnBeforeDownload(IWebBrowser webBrowser, IBrowser browser, DownloadI
 					string path = myForm.CalcDownloadPath(item);
 
 					// if file should not be saved, path will be null, so skip file
-					if (path != null) {
+					if (path == null) {
 
 						// skip file
 						callback.Continue(path, false);
 
-					} else {
-
-						// download file
-						callback.Dispose();
+					}
+					else {
 
 						// open the downloads tab
 						myForm.OpenDownloadsTab();
-
+						callback.Continue(path, true);
 					}
 
 				}

src/Handlers/HostHandler.cs

@@ -21,7 +21,6 @@ public void addNewBrowserTab(string url, bool focusNewTab = true) {
 		public string getDownloads() {
 			lock (myForm.downloads) {
 				string x = JSON.Instance.ToJSON(myForm.downloads);
-				//MessageBox.Show(x);
 				return x;
 			}
 		}

src/Handlers/ResourceRequestHandler.cs

@@ -11,7 +11,7 @@
 
 namespace SharpBrowser {
 	internal class ResourceRequestHandler : IResourceRequestHandler {
-		MainForm myForm;
+		readonly MainForm myForm;
 		public ResourceRequestHandler(MainForm form) {
 			myForm = form;
 		}
@@ -125,7 +125,7 @@ public CefReturnValue OnBeforeResourceLoad(IWebBrowser chromiumWebBrowser, IBrow
 			if (tab != null && tab.RefererURL != null) {
 
 				// Set referer
-				request.SetReferrer(tab.RefererURL, ReferrerPolicy.Always);
+				request.SetReferrer(tab.RefererURL, ReferrerPolicy.Default);
 
 			}
 
@@ -193,6 +193,12 @@ public void OnResourceLoadComplete(IWebBrowser chromiumWebBrowser, IBrowser brow
 			int code = response.StatusCode;
 
 
+			// exit if frame is invalid (if the frame has closed, for example)
+			if (!frame.IsValid) {
+				return;
+			}
+
+
 			// if NOT FOUND
 			if (code == 404) {
 

src/MainForm.cs

@@ -28,9 +28,11 @@ internal partial class MainForm : Form {
 		public static MainForm Instance;
 
 		public static string Branding = "SharpBrowser";
-		public static string UserAgent = "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.120 Safari/537.36";
+		public static string UserAgent = "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.36";
+		public static string AcceptLanguage = "en-US,en;q=0.9";
 		public static string HomepageURL = "https://www.google.com";
 		public static string NewTabURL = "about:blank";
+		public static string InternalURL = "sharpbrowser";
 		public static string DownloadsURL = "sharpbrowser://storage/downloads.html";
 		public static string FileNotFoundURL = "sharpbrowser://storage/errors/notFound.html";
 		public static string CannotConnectURL = "sharpbrowser://storage/errors/cannotConnect.html";
@@ -155,15 +157,17 @@ public void InitTooltips(System.Windows.Forms.Control.ControlCollection parent)
 		private void InitBrowser() {
 
 			CefSharpSettings.LegacyJavascriptBindingEnabled = true;
+			CefSharpSettings.WcfEnabled = false;
 
 			CefSettings settings = new CefSettings();
 
 			settings.RegisterScheme(new CefCustomScheme {
-				SchemeName = "sharpbrowser",
+				SchemeName = InternalURL,
 				SchemeHandlerFactory = new SchemeHandlerFactory()
 			});
 
 			settings.UserAgent = UserAgent;
+			settings.AcceptLanguageList = AcceptLanguage;
 
 			settings.IgnoreCertificateErrors = true;
 
@@ -233,11 +237,11 @@ private void LoadURL(string url) {
 
 				Uri.TryCreate(url, UriKind.Absolute, out outUri);
 
-				if (!(urlLower.StartsWith("http") || urlLower.StartsWith("sharpbrowser"))) {
+				if (!(urlLower.StartsWith("http") || urlLower.StartsWith(InternalURL))) {
 					if (outUri == null || outUri.Scheme != Uri.UriSchemeFile) newUrl = "http://" + url;
 				}
 
-				if (urlLower.StartsWith("sharpbrowser:") ||
+				if (urlLower.StartsWith(InternalURL + ":") ||
 
 					// load URL if it seems valid
 					(Uri.TryCreate(newUrl, UriKind.Absolute, out outUri)
@@ -306,7 +310,7 @@ private bool IsBlank(string url) {
 			return (url == "" || url == "about:blank");
 		}
 		private bool IsBlankOrSystem(string url) {
-			return (url == "" || url.BeginsWith("about:") || url.BeginsWith("chrome:") || url.BeginsWith("sharpbrowser:"));
+			return (url == "" || url.BeginsWith("about:") || url.BeginsWith("chrome:") || url.BeginsWith(InternalURL + ":"));
 		}
 
 		public void AddBlankWindow() {
@@ -392,8 +396,8 @@ private SharpTab AddNewBrowser(FATabStripItem tabStrip, String url) {
 			// save tab obj in tabstrip
 			tabStrip.Tag = tab;
 
-			if (url.StartsWith("sharpbrowser:")) {
-				browser.RegisterAsyncJsObject("host", host);
+			if (url.StartsWith(InternalURL + ":")) {
+				browser.JavascriptObjectRepository.Register("host", host, true, BindingOptions.DefaultBinder);
 			}
 			return tab;
 		}
@@ -824,15 +828,7 @@ public void UpdateDownloadItem(DownloadItem item) {
 		}
 
 		public string CalcDownloadPath(DownloadItem item) {
-
-			string itemName = item.SuggestedFileName != null ? item.SuggestedFileName.GetAfterLast(".") + " file" : "downloads";
-
-			string path = null;
-			if (path != null) {
-				return path;
-			}
-
-			return null;
+			return item.SuggestedFileName;
 		}
 
 		public bool DownloadsInProgress() {