diff --git a/plugins/3MFReader/ThreeMFWorkspaceReader.py b/plugins/3MFReader/ThreeMFWorkspaceReader.py
index 16ab22473b..6d55e0643d 100755
--- a/plugins/3MFReader/ThreeMFWorkspaceReader.py
+++ b/plugins/3MFReader/ThreeMFWorkspaceReader.py
@@ -85,14 +85,6 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
     def __init__(self) -> None:
         super().__init__()
 
-        MimeTypeDatabase.addMimeType(
-            MimeType(
-                name="application/x-curaproject+xml",
-                comment="Cura Project File",
-                suffixes=["curaproject.3mf"]
-            )
-        )
-
         self._supported_extensions = [".3mf"]
         self._dialog = WorkspaceDialog()
         self._3mf_mesh_reader = None
@@ -726,8 +718,6 @@ class ThreeMFWorkspaceReader(WorkspaceReader):
             nodes = []
 
         base_file_name = os.path.basename(file_name)
-        if base_file_name.endswith(".curaproject.3mf"):
-            base_file_name = base_file_name[:base_file_name.rfind(".curaproject.3mf")]
         self.setWorkspaceName(base_file_name)
         return nodes
 
diff --git a/plugins/3MFReader/__init__.py b/plugins/3MFReader/__init__.py
index 3a4fde4ab8..ce94bbe69c 100644
--- a/plugins/3MFReader/__init__.py
+++ b/plugins/3MFReader/__init__.py
@@ -18,11 +18,7 @@ catalog = i18nCatalog("cura")
 
 
 def getMetaData() -> Dict:
-    # Workaround for osx not supporting double file extensions correctly.
-    if Platform.isOSX():
-        workspace_extension = "3mf"
-    else:
-        workspace_extension = "curaproject.3mf"
+    workspace_extension = "3mf"
 
     metaData = {}
     if "3MFReader.ThreeMFReader" in sys.modules:
diff --git a/plugins/3MFWriter/__init__.py b/plugins/3MFWriter/__init__.py
index e779628f7e..4b8a03888d 100644
--- a/plugins/3MFWriter/__init__.py
+++ b/plugins/3MFWriter/__init__.py
@@ -15,11 +15,7 @@ from UM.Platform import Platform
 i18n_catalog = i18nCatalog("uranium")
 
 def getMetaData():
-    # Workarround for osx not supporting double file extensions correctly.
-    if Platform.isOSX():
-        workspace_extension = "3mf"
-    else:
-        workspace_extension = "curaproject.3mf"
+    workspace_extension = "3mf"
 
     metaData = {}
 
@@ -36,7 +32,7 @@ def getMetaData():
             "output": [{
                 "extension": workspace_extension,
                 "description": i18n_catalog.i18nc("@item:inlistbox", "Cura Project 3MF file"),
-                "mime_type": "application/x-curaproject+xml",
+                "mime_type": "application/vnd.ms-package.3dmanufacturing-3dmodel+xml",
                 "mode": ThreeMFWorkspaceWriter.ThreeMFWorkspaceWriter.OutputMode.BinaryMode
             }]
         }
diff --git a/resources/qml/Cura.qml b/resources/qml/Cura.qml
index 33e456c758..616523fc45 100644
--- a/resources/qml/Cura.qml
+++ b/resources/qml/Cura.qml
@@ -120,7 +120,7 @@ UM.MainWindow
                     text: catalog.i18nc("@title:menu menubar:file","Save...")
                     onTriggered:
                     {
-                        var args = { "filter_by_machine": false, "file_type": "workspace", "preferred_mimetypes": "application/x-curaproject+xml" };
+                        var args = { "filter_by_machine": false, "file_type": "workspace", "preferred_mimetypes": "application/vnd.ms-package.3dmanufacturing-3dmodel+xml" };
                         if(UM.Preferences.getValue("cura/dialog_on_project_save"))
                         {
                             saveWorkspaceDialog.args = args;