diff --git a/views/default-mobile.handlebars b/views/default-mobile.handlebars
index 2fb82d447f..e323a9341d 100644
--- a/views/default-mobile.handlebars
+++ b/views/default-mobile.handlebars
@@ -1338,6 +1338,8 @@
         var serverPublicNamePort = '{{{serverDnsName}}}:{{{serverPublicPort}}}';
         var debugmode = false;
         var attemptWebRTC = ((features & 128) != 0);
+        var webrtcconfiguration = '{{{webrtcconfig}}}';
+        if (webrtcconfiguration == '') { webrtcconfiguration = null; } else { try { webrtcconfiguration = JSON.parse(decodeURIComponent(webrtcconfiguration)); } catch (ex) { console.log('Invalid WebRTC config: "' + webrtcconfiguration + '".'); webrtcconfiguration = null; } }
         var StatusStrs = ["Disconnected", "Connecting...", "Setup...", "Connected", "Intel® AMT Connected"];
         var agentsStr = ["Unknown", "Windows 32bit console", "Windows 64bit console", "Windows 32bit service", "Windows 64bit service", "Linux 32bit", "Linux 64bit", "MIPS", "XENx86", "Android ARM", "Linux ARM", "macOS x86-32bit", "Android x86", "PogoPlug ARM", "Android", "Linux Poky x86-32bit", "macOS x86-64bit", "ChromeOS", "Linux Poky x86-64bit", "Linux NoKVM x86-32bit", "Linux NoKVM x86-64bit", "Windows MinCore console", "Windows MinCore service", "NodeJS", "ARM-Linaro", "ARMv6l / ARMv7l", "ARMv8 64bit", "ARMv6l / ARMv7l / NoKVM", "MIPS24KC (OpenWRT)", "Apple Silicon", "FreeBSD x86-64", "Unknown", "Linux ARM 64 bit (glibc/2.24 NOKVM)", "Alpine Linux x86 64 Bit (MUSL)", "Assistant (Windows)", "Armada370 - ARM32/HF (libc/2.26)", "OpenWRT x86-64", "OpenBSD x86-64", "Unknown", "Unknown", "MIPSEL24KC (OpenWRT)", "ARMADA/CORTEX-A53/MUSL (OpenWRT)", "Windows ARM 64bit console", "Windows ARM 64bit service"];
         var files;
@@ -4565,6 +4567,7 @@
                     desktop.debugmode = debugmode;
                     desktop.m.debugmode = debugmode;
                     desktop.attemptWebRTC = attemptWebRTC;
+                    desktop.webrtcconfig = webrtcconfiguration;
                     desktop.options = {};
                     if (tsid != null) { desktop.options.tsid = tsid; }
                     if (consent != null) { desktop.options.consent = consent; }
@@ -5566,6 +5569,7 @@
                 if (contype == 2) { files.urlname = 'sshfilesrelay.ashx'; } // If this is a SSH session, change the URL to the SSH application relay.
                 files.contype = contype;
                 files.attemptWebRTC = attemptWebRTC;
+                files.webrtcconfig = webrtcconfiguration;
                 files.onStateChanged = onFilesStateChange;
                 files.onConsoleMessageChange = function () {
                     if (files.consoleMessage) {
@@ -6083,7 +6087,7 @@
                 if (start >= data.byteLength) {
                     files.sendText(JSON.stringify({ action: 'uploaddone', reqid: uploadFile.xfilePtr }));
                 } else {
-                    var end = uploadFile.xptr + 65565;
+                    var end = uploadFile.xptr + (attemptWebRTC ? 16384 : 65536);
                     if (end > data.byteLength) { if (dataPriming == true) { return; } end = data.byteLength; }
                     var dataslice = new Uint8Array(data.slice(start, end))
                     if ((dataslice[0] == 123) || (dataslice[0] == 0)) {
@@ -6099,7 +6103,7 @@
             } else if (uploadFile.xfile) {
                 if (uploadFile.xreader != null) return; // Data reading already in process
                 if (uploadFile.xptr >= uploadFile.xfile.size) return;
-                var end = uploadFile.xptr + 65565;
+                var end = uploadFile.xptr + (attemptWebRTC ? 16384 : 65536);
                 if (end > uploadFile.xfile.size) { if (dataPriming == true) { return; } end = uploadFile.xfile.size; }
                 uploadFile.xreader = new FileReader();
                 uploadFile.xreader.onerror = function (err) { console.log(err); }
diff --git a/views/default.handlebars b/views/default.handlebars
index 85ba49a17c..a262105023 100644
--- a/views/default.handlebars
+++ b/views/default.handlebars
@@ -5215,6 +5215,7 @@
                     desk.m.mouseCursorActive(xxcurrentView == 11);
                     desk.shortid = shortid;
                     desk.attemptWebRTC = attemptWebRTC;
+                    desk.webrtcconfig = webrtcconfiguration;
                     desk.onStateChanged = onMultiDesktopStateChange;
                     //desk.onConsoleMessageChange = function () { console.log('CONSOLEMSG:', desk.consoleMessage); }
                     desk.m.ImageType = multidesktopsettings.agentencoding; // Send 4 if WebP is supported, otherwise send 1 for JPEG.
@@ -11020,6 +11021,7 @@
                 files.contype = contype;
                 files.options = { consent: consent }
                 files.attemptWebRTC = attemptWebRTC;
+                files.webrtcconfig = webrtcconfiguration;
                 files.onStateChanged = onFilesStateChange;
                 files.onConsoleMessageChange = function () {
                     if (files.consoleMessage) {
@@ -11760,7 +11762,7 @@
                 if (start >= data.byteLength) {
                     files.sendText(JSON.stringify({ action: 'uploaddone', reqid: uploadFile.xfilePtr }));
                 } else {
-                    var end = uploadFile.xptr + 65565;
+                var end = uploadFile.xptr + (attemptWebRTC ? 16384 : 65536);
                     if (end > data.byteLength) { if (dataPriming == true) { return; } end = data.byteLength; }
                     var dataslice = new Uint8Array(data.slice(start, end))
                     if ((dataslice[0] == 123) || (dataslice[0] == 0)) {
@@ -11776,7 +11778,7 @@
             } else if (uploadFile.xfile) {
                 if (uploadFile.xreader != null) return; // Data reading already in process
                 if (uploadFile.xptr >= uploadFile.xfile.size) return;
-                var end = uploadFile.xptr + 65565;
+                var end = uploadFile.xptr + (attemptWebRTC ? 16384 : 65536);
                 if (end > uploadFile.xfile.size) { if (dataPriming == true) { return; } end = uploadFile.xfile.size; }
                 uploadFile.xreader = new FileReader();
                 uploadFile.xreader.onerror = function (err) { console.log(err); }
diff --git a/views/sharing-mobile.handlebars b/views/sharing-mobile.handlebars
index 0064531c79..cc8a9d0376 100644
--- a/views/sharing-mobile.handlebars
+++ b/views/sharing-mobile.handlebars
@@ -2363,7 +2363,7 @@
         function p13uploadNextPart(dataPriming) {
             if (uploadFile.xreader != null) return; // Data reading already in process
             if (uploadFile.xptr >= uploadFile.xfile.size) return;
-            var end = uploadFile.xptr + 65565;
+            var end = uploadFile.xptr + 65536;
             if (end > uploadFile.xfile.size) { if (dataPriming == true) { return; } end = uploadFile.xfile.size; }
             uploadFile.xreader = new FileReader();
             uploadFile.xreader.onerror = function (err) { console.log(err); }
diff --git a/views/sharing.handlebars b/views/sharing.handlebars
index 0b0987f4a4..8cf9e694c9 100644
--- a/views/sharing.handlebars
+++ b/views/sharing.handlebars
@@ -2193,7 +2193,7 @@
             if (start >= data.byteLength) {
                 files.sendText(JSON.stringify({ action: 'uploaddone', reqid: uploadFile.xfilePtr }));
             } else {
-                var end = uploadFile.xptr + 65565;
+                var end = uploadFile.xptr + 65536;
                 if (end > data.byteLength) { if (dataPriming == true) { return; } end = data.byteLength; }
                 var dataslice = new Uint8Array(data.slice(start, end))
                 if ((dataslice[0] == 123) || (dataslice[0] == 0)) {