diff --git a/plugins/USBPrinting/USBPrinterOutputDeviceManager.py b/plugins/USBPrinting/USBPrinterOutputDeviceManager.py
index 801ce4743f..7d1b3fea3b 100644
--- a/plugins/USBPrinting/USBPrinterOutputDeviceManager.py
+++ b/plugins/USBPrinting/USBPrinterOutputDeviceManager.py
@@ -103,10 +103,11 @@ class USBPrinterOutputDeviceManager(QObject, OutputDevicePlugin, Extension):
 
         self._firmware_view.show()
 
-    @pyqtSlot()
-    def updateAllFirmware(self):
+    @pyqtSlot(str)
+    def updateAllFirmware(self, file_name):
+        file_name = file_name.replace("file://", "")  # File dialogs prepend the path with file://, which we don't need / want
         if not self._usb_output_devices:
-            Message(i18n_catalog.i18nc("@info","Cannot update firmware, there were no connected printers found.")).show()
+            Message(i18n_catalog.i18nc("@info", "Cannot update firmware, there were no connected printers found.")).show()
             return
 
         for printer_connection in self._usb_output_devices:
@@ -114,26 +115,26 @@ class USBPrinterOutputDeviceManager(QObject, OutputDevicePlugin, Extension):
         self.spawnFirmwareInterface("")
         for printer_connection in self._usb_output_devices:
             try:
-                self._usb_output_devices[printer_connection].updateFirmware(Resources.getPath(CuraApplication.ResourceTypes.Firmware, self._getDefaultFirmwareName()))
+                self._usb_output_devices[printer_connection].updateFirmware(file_name)
             except FileNotFoundError:
                 # Should only happen in dev environments where the resources/firmware folder is absent.
                 self._usb_output_devices[printer_connection].setProgress(100, 100)
-                Logger.log("w", "No firmware found for printer %s called '%s'" %(printer_connection, self._getDefaultFirmwareName()))
+                Logger.log("w", "No firmware found for printer %s called '%s'" % (printer_connection, self.getDefaultFirmwareName()))
                 Message(i18n_catalog.i18nc("@info",
                     "Could not find firmware required for the printer at %s.") % printer_connection).show()
                 self._firmware_view.close()
 
                 continue
 
-    @pyqtSlot(str, result = bool)
-    def updateFirmwareBySerial(self, serial_port):
+    @pyqtSlot(str, str, result = bool)
+    def updateFirmwareBySerial(self, serial_port, file_name):
         if serial_port in self._usb_output_devices:
             self.spawnFirmwareInterface(self._usb_output_devices[serial_port].getSerialPort())
             try:
-                self._usb_output_devices[serial_port].updateFirmware(Resources.getPath(CuraApplication.ResourceTypes.Firmware, self._getDefaultFirmwareName()))
+                self._usb_output_devices[serial_port].updateFirmware(file_name)
             except FileNotFoundError:
                 self._firmware_view.close()
-                Logger.log("e", "Could not find firmware required for this machine called '%s'" %(self._getDefaultFirmwareName()))
+                Logger.log("e", "Could not find firmware required for this machine called '%s'" % (self.getDefaultFirmwareName()))
                 return False
             return True
         return False
@@ -147,7 +148,8 @@ class USBPrinterOutputDeviceManager(QObject, OutputDevicePlugin, Extension):
 
         return USBPrinterOutputDeviceManager._instance
 
-    def _getDefaultFirmwareName(self):
+    @pyqtSlot(result = str)
+    def getDefaultFirmwareName(self):
         # Check if there is a valid global container stack
         global_container_stack = Application.getInstance().getGlobalContainerStack()
         if not global_container_stack:
@@ -193,13 +195,13 @@ class USBPrinterOutputDeviceManager(QObject, OutputDevicePlugin, Extension):
                 Logger.log("d", "Choosing basic firmware for machine %s.", machine_id)
                 hex_file = machine_without_extras[machine_id]  # Return "basic" firmware
         else:
-            Logger.log("e", "There is no firmware for machine %s.", machine_id)
+            Logger.log("w", "There is no firmware for machine %s.", machine_id)
 
         if hex_file:
-            return hex_file.format(baudrate=baudrate)
+            return Resources.getPath(CuraApplication.ResourceTypes.Firmware, hex_file.format(baudrate=baudrate))
         else:
-            Logger.log("e", "Could not find any firmware for machine %s.", machine_id)
-            raise FileNotFoundError()
+            Logger.log("w", "Could not find any firmware for machine %s.", machine_id)
+            return ""
 
     ##  Helper to identify serial ports (and scan for them)
     def _addRemovePorts(self, serial_ports):
diff --git a/plugins/UltimakerMachineActions/UpgradeFirmwareMachineAction.qml b/plugins/UltimakerMachineActions/UpgradeFirmwareMachineAction.qml
index 0c9b80c010..ce2e2a39cb 100644
--- a/plugins/UltimakerMachineActions/UpgradeFirmwareMachineAction.qml
+++ b/plugins/UltimakerMachineActions/UpgradeFirmwareMachineAction.qml
@@ -5,6 +5,7 @@ import QtQuick 2.2
 import QtQuick.Controls 1.1
 import QtQuick.Layouts 1.1
 import QtQuick.Window 2.1
+import QtQuick.Dialogs 1.2 // For filedialog
 
 import UM 1.2 as UM
 import Cura 1.0 as Cura
@@ -44,34 +45,45 @@ Cura.MachineAction
             anchors.topMargin: UM.Theme.getSize("default_margin").height
             width: parent.width
             wrapMode: Text.WordWrap
-            text: catalog.i18nc("@label", "The firmware shipping with new Ultimakers works, but upgrades have been made to make better prints, and make calibration easier.");
+            text: catalog.i18nc("@label", "The firmware shipping with new Printers works, but new versions tend to have more features and improvements.");
         }
 
-        Label
-        {
-            id: upgradeText2
-            anchors.top: upgradeText1.bottom
-            anchors.topMargin: UM.Theme.getSize("default_margin").height
-            width: parent.width
-            wrapMode: Text.WordWrap
-            text: catalog.i18nc("@label", "Cura requires these new features and thus your firmware will most likely need to be upgraded. You can do so now.");
-        }
         Row
         {
-            anchors.top: upgradeText2.bottom
+            anchors.top: upgradeText1.bottom
             anchors.topMargin: UM.Theme.getSize("default_margin").height
             anchors.horizontalCenter: parent.horizontalCenter
             width: childrenRect.width
             spacing: UM.Theme.getSize("default_margin").width
+            property var firmwareName: Cura.USBPrinterManager.getDefaultFirmwareName()
             Button
             {
-                id: upgradeButton
-                text: catalog.i18nc("@action:button","Upgrade to Marlin Firmware");
+                id: autoUpgradeButton
+                text: catalog.i18nc("@action:button", "Automatically upgrade Firmware");
+                enabled: parent.firmwareName != ""
                 onClicked:
                 {
-                    Cura.USBPrinterManager.updateAllFirmware()
+                    Cura.USBPrinterManager.updateAllFirmware(parent.firmwareName)
+                }
+            }
+            Button
+            {
+                id: manualUpgradeButton
+                text: catalog.i18nc("@action:button", "Upload custom Firmware");
+                onClicked:
+                {
+                    customFirmwareDialog.open()
                 }
             }
         }
+
+        FileDialog
+        {
+            id: customFirmwareDialog
+            title: catalog.i18nc("@title:window", "Select custom firmware")
+            nameFilters:  "Firmware image files (*.hex)"
+            selectExisting: true
+            onAccepted: Cura.USBPrinterManager.updateAllFirmware(fileUrl)
+        }
     }
 }
\ No newline at end of file