diff --git a/cura/CuraApplication.py b/cura/CuraApplication.py
index 67c420028b..bae609c07b 100755
--- a/cura/CuraApplication.py
+++ b/cura/CuraApplication.py
@@ -356,7 +356,7 @@ class CuraApplication(QtApplication):
         self._machine_action_manager.initialize()
 
     def __sendCommandToSingleInstance(self):
-        self._single_instance = SingleInstance(self, self._files_to_open)
+        self._single_instance = SingleInstance(self, self._files_to_open, self._open_url_queue)
 
         # If we use single instance, try to connect to the single instance server, send commands, and then exit.
         # If we cannot find an existing single instance server, this is the only instance, so just keep going.
diff --git a/cura/SingleInstance.py b/cura/SingleInstance.py
index fb85e258db..02fa6622aa 100644
--- a/cura/SingleInstance.py
+++ b/cura/SingleInstance.py
@@ -7,14 +7,15 @@ from typing import List, Optional
 
 from PyQt6.QtNetwork import QLocalServer, QLocalSocket
 
-from UM.Qt.QtApplication import QtApplication #For typing.
+from UM.Qt.QtApplication import QtApplication  # For typing.
 from UM.Logger import Logger
 
 
 class SingleInstance:
-    def __init__(self, application: QtApplication, files_to_open: Optional[List[str]]) -> None:
+    def __init__(self, application: QtApplication, files_to_open: Optional[List[str]], url_to_open: Optional[List[str]]) -> None:
         self._application = application
         self._files_to_open = files_to_open
+        self._url_to_open = url_to_open
 
         self._single_instance_server = None
 
@@ -33,7 +34,7 @@ class SingleInstance:
             return False
 
         # We only send the files that need to be opened.
-        if not self._files_to_open:
+        if not self._files_to_open or not self._url_to_open:
             Logger.log("i", "No file need to be opened, do nothing.")
             return True
 
@@ -46,18 +47,21 @@ class SingleInstance:
 
             if self._application.getPreferences().getValue("cura/single_instance_clear_before_load"):
                 payload = {"command": "clear-all"}
-                single_instance_socket.write(bytes(json.dumps(payload) + "\n", encoding = "ascii"))
+                single_instance_socket.write(bytes(json.dumps(payload) + "\n", encoding="ascii"))
 
             payload = {"command": "focus"}
-            single_instance_socket.write(bytes(json.dumps(payload) + "\n", encoding = "ascii"))
+            single_instance_socket.write(bytes(json.dumps(payload) + "\n", encoding="ascii"))
 
             for filename in self._files_to_open:
-                Logger.log("i",f"Filename isxxx {os.path(filename)}")
                 payload = {"command": "open", "filePath": os.path.abspath(filename)}
-                single_instance_socket.write(bytes(json.dumps(payload) + "\n", encoding = "ascii"))
+                single_instance_socket.write(bytes(json.dumps(payload) + "\n", encoding="ascii"))
+
+            for filename in self._url_to_open:
+                payload = {"command": "open", "urlPath": os.path.abspath(filename)}
+                single_instance_socket.write(bytes(json.dumps(payload) + "\n", encoding="ascii"))
 
             payload = {"command": "close-connection"}
-            single_instance_socket.write(bytes(json.dumps(payload) + "\n", encoding = "ascii"))
+            single_instance_socket.write(bytes(json.dumps(payload) + "\n", encoding="ascii"))
 
             single_instance_socket.flush()
             single_instance_socket.waitForDisconnected()
@@ -73,7 +77,7 @@ class SingleInstance:
 
     def _onClientConnected(self) -> None:
         Logger.log("i", "New connection received on our single-instance server")
-        connection = None #type: Optional[QLocalSocket]
+        connection = None  # type: Optional[QLocalSocket]
         if self._single_instance_server:
             connection = self._single_instance_server.nextPendingConnection()
 
@@ -82,10 +86,9 @@ class SingleInstance:
 
     def __readCommands(self, connection: QLocalSocket) -> None:
         line = connection.readLine()
-        Logger.log("i", f"line read is {line}")
-        while len(line) != 0:    # There is also a .canReadLine()
+        while len(line) != 0:  # There is also a .canReadLine()
             try:
-                payload = json.loads(str(line, encoding = "ascii").strip())
+                payload = json.loads(str(line, encoding="ascii").strip())
                 command = payload["command"]
 
                 # Command: Remove all models from the build plate.
@@ -96,8 +99,8 @@ class SingleInstance:
                 elif command == "open":
                     if payload["filePath"].file():
                         self._application.callLater(lambda f = payload["filePath"]: self._application._openFile(f))
-                    if payload["filePath"].url():
-                        self._application.callLater(lambda f= payload["filepath"]: self._application._openUrl(f))
+                    if payload["urlPath"].url():
+                        self._application.callLater(lambda f = payload["urlPath"]: self._application._openUrl(f))
 
 
                 # Command: Activate the window and bring it to the top.
@@ -106,7 +109,7 @@ class SingleInstance:
                     # 'alert' or flashing the icon in the taskbar is the best thing we do now.
                     main_window = self._application.getMainWindow()
                     if main_window is not None:
-                        self._application.callLater(lambda: main_window.alert(0)) # type: ignore # I don't know why MyPy complains here
+                        self._application.callLater(lambda: main_window.alert(0))  # type: ignore # I don't know why MyPy complains here
 
                 # Command: Close the socket connection. We're done.
                 elif command == "close-connection":
diff --git a/packaging/NSIS/Ultimaker-Cura.nsi.jinja b/packaging/NSIS/Ultimaker-Cura.nsi.jinja
index 2106c47312..0a2ce0f517 100644
--- a/packaging/NSIS/Ultimaker-Cura.nsi.jinja
+++ b/packaging/NSIS/Ultimaker-Cura.nsi.jinja
@@ -156,7 +156,7 @@ WriteRegStr HKCR "slicer" "" "URL:slicer"
 WriteRegStr HKCR "slicer" "URL Protocol" ""
 WriteRegStr HKCR "slicer\DefaultIcon" "" "$INSTDIR\${MAIN_APP_EXE},1"
 WriteRegStr HKCR "slicer\shell" "" "open"
-WriteRegStr HKCR "slicer\shell\open\command" "" '"$INSTDIR\${MAIN_APP_EXE}" --single-instance "%1"'
+WriteRegStr HKCR "slicer\shell\open\command" "" '"$INSTDIR\${MAIN_APP_EXE}" "%1"'
 
 SectionEnd
 ######################################################################
diff --git a/packaging/msi/UltiMaker-Cura.wxs.jinja b/packaging/msi/UltiMaker-Cura.wxs.jinja
index 1f22dcc8bc..21f017c813 100644
--- a/packaging/msi/UltiMaker-Cura.wxs.jinja
+++ b/packaging/msi/UltiMaker-Cura.wxs.jinja
@@ -165,9 +165,7 @@
                 <RegistryValue Type="string" Value="URL:Cura Protocol"/>
                 <RegistryValue Type="string" Name="URL Protocol" Value=""/>
                 <RegistryValue Type="string" Key="DefaultIcon" Value="[APPLICATIONFOLDER]\{{ main_app }},1"/>
-                <RegistryValue Type="string" Key="shell\open\command" Value="&quot;[APPLICATIONFOLDER]\{{ main_app }}&quot; --single-instance &quot;%1&quot;"/>
-                <Verb Id="open_url" Command="Open" Argument='"%1"' />
-                <MIME Advertise="yes" ContentType="application/url" Default="yes" />
+                <RegistryValue Type="string" Key="shell\open\command" Value="&quot;[APPLICATIONFOLDER]\{{ main_app }}&quot; &quot;%1&quot;"/>
             </RegistryKey>
         </Component>