diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index e8814bf93..068760e6b 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -230,7 +230,7 @@ KolbyML <https://github.com/KolbyML>
 Adnane Taghi <dev@soleuniverse.me>
 Spiritual Father <https://github.com/spiritualfather>
 Emmanuel Ferdman <https://github.com/emmanuel-ferdman>
-
+Marvin Kopf <marvinkopf@outlook.com>
 ********************
 
 The text of the 3 clause BSD license follows:
diff --git a/qt/aqt/browser/browser.py b/qt/aqt/browser/browser.py
index 11488dd03..a53b21b2d 100644
--- a/qt/aqt/browser/browser.py
+++ b/qt/aqt/browser/browser.py
@@ -53,6 +53,7 @@ from aqt.operations.tag import (
 from aqt.qt import *
 from aqt.sound import av_player
 from aqt.switch import Switch
+from aqt.theme import WidgetStyle
 from aqt.undo import UndoActionsInfo
 from aqt.utils import (
     HelpPage,
@@ -170,6 +171,7 @@ class Browser(QMainWindow):
         if self.height() != 0:
             self.aspect_ratio = self.width() / self.height()
         self.set_layout(self.mw.pm.browser_layout(), True)
+        self.onSidebarVisibilityChange(not self.sidebarDockWidget.isHidden())
         # disable undo/redo
         self.on_undo_state_change(mw.undo_actions_info())
         # legacy alias
@@ -726,6 +728,7 @@ class Browser(QMainWindow):
             self.form.actionSidebarFilter.triggered,
             self.focusSidebarSearchBar,
         )
+        qconnect(dw.visibilityChanged, self.onSidebarVisibilityChange)
         grid = QGridLayout()
         grid.addWidget(self.sidebar.searchBar, 0, 0)
         grid.addWidget(self.sidebar.toolbar, 0, 1)
@@ -745,9 +748,17 @@ class Browser(QMainWindow):
         self.mw.progress.timer(10, self.sidebar.refresh, False, parent=self.sidebar)
 
     def showSidebar(self, show: bool = True) -> None:
-        want_visible = not self.sidebarDockWidget.isVisible()
         self.sidebarDockWidget.setVisible(show)
-        if want_visible and show:
+
+    def onSidebarVisibilityChange(self, visible):
+        margins = self.form.verticalLayout_3.contentsMargins()
+        skip_left_margin = visible and not (
+            is_mac and aqt.mw.pm.get_widget_style() == WidgetStyle.NATIVE
+        )
+        margins.setLeft(0 if skip_left_margin else margins.right())
+        self.form.verticalLayout_3.setContentsMargins(margins)
+
+        if visible:
             self.sidebar.refresh()
 
     def focusSidebar(self) -> None:
diff --git a/qt/aqt/mediasrv.py b/qt/aqt/mediasrv.py
index 67869f9a9..3fd1996af 100644
--- a/qt/aqt/mediasrv.py
+++ b/qt/aqt/mediasrv.py
@@ -7,9 +7,8 @@ import enum
 import logging
 import mimetypes
 import os
-import random
 import re
-import string
+import secrets
 import sys
 import threading
 import traceback
@@ -843,7 +842,7 @@ def legacy_page_data() -> Response:
         return _text_response(HTTPStatus.NOT_FOUND, "page not found")
 
 
-_APIKEY = "".join(random.choices(string.ascii_letters + string.digits, k=32))
+_APIKEY = secrets.token_urlsafe(32)
 
 
 def _have_api_access() -> bool:
diff --git a/qt/aqt/mpv.py b/qt/aqt/mpv.py
index 60ea21290..329a95538 100644
--- a/qt/aqt/mpv.py
+++ b/qt/aqt/mpv.py
@@ -41,6 +41,7 @@ import time
 from queue import Empty, Full, Queue
 from shutil import which
 
+import aqt
 from anki.utils import is_mac, is_win
 
 
@@ -444,7 +445,7 @@ class MPV(MPVBase):
 
         super().__init__(*args, **kwargs)
 
-        self._register_callbacks()
+        aqt.mw.taskman.run_in_background(self._register_callbacks, None)
 
     def _register_callbacks(self):
         self._callbacks = {}
diff --git a/ts/lib/components/EnumSelector.svelte b/ts/lib/components/EnumSelector.svelte
index 328946bd2..8a711e9c0 100644
--- a/ts/lib/components/EnumSelector.svelte
+++ b/ts/lib/components/EnumSelector.svelte
@@ -20,16 +20,11 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     export let disabledChoices: T[] = [];
 
     $: label = choices.find((c) => c.value === value)?.label;
-</script>
-
-<Select
-    bind:value
-    {label}
-    {disabled}
-    list={choices}
-    parser={(item) => ({
+    $: parser = (item) => ({
         content: item.label,
         value: item.value,
         disabled: disabledChoices.includes(item.value),
-    })}
-/>
+    });
+</script>
+
+<Select bind:value {label} {disabled} list={choices} {parser} />