diff --git a/desktop/main.cjs b/desktop/main.cjs
--- a/desktop/main.cjs
+++ b/desktop/main.cjs
@@ -1,4 +1,11 @@
-const { app, BrowserWindow, shell, Menu, ipcMain } = require('electron');
+const {
+  app,
+  BrowserWindow,
+  shell,
+  Menu,
+  ipcMain,
+  systemPreferences,
+} = require('electron');
 const fs = require('fs');
 const path = require('path');
 
@@ -96,6 +103,31 @@
     updateNavigationState();
   });
 
+  ipcMain.on('double-click-top-bar', () => {
+    if (isMac) {
+      // Possible values for AppleActionOnDoubleClick are Maximize,
+      // Minimize or None. We handle the last two inside this if.
+      // Maximize (which is the only behaviour for other platforms)
+      // is handled in the later block.
+      const action = systemPreferences.getUserDefault(
+        'AppleActionOnDoubleClick',
+        'string',
+      );
+      if (action === 'None') {
+        return;
+      } else if (action === 'Minimize') {
+        win.minimize();
+        return;
+      }
+    }
+
+    if (win.isMaximized()) {
+      win.unmaximize();
+    } else {
+      win.maximize();
+    }
+  });
+
   win.webContents.setWindowOpenHandler(({ url: openURL }) => {
     shell.openExternal(openURL);
     // Returning 'deny' prevents a new electron window from being created
diff --git a/desktop/preload.cjs b/desktop/preload.cjs
--- a/desktop/preload.cjs
+++ b/desktop/preload.cjs
@@ -7,6 +7,7 @@
     return () => ipcRenderer.removeListener('on-navigate', withEvent);
   },
   clearHistory: () => ipcRenderer.send('clear-history'),
+  doubleClickTopBar: () => ipcRenderer.send('double-click-top-bar'),
 };
 
 contextBridge.exposeInMainWorld('electronContextBridge', bridge);
diff --git a/web/app.react.js b/web/app.react.js
--- a/web/app.react.js
+++ b/web/app.react.js
@@ -162,6 +162,9 @@
     );
   }
 
+  onHeaderDoubleClick = () => electron?.doubleClickTopBar();
+  stopDoubleClickPropagation = electron ? e => e.stopPropagation() : null;
+
   renderMainContent() {
     let mainContent;
     const { tab, settingsSection } = this.props.navInfo;
@@ -188,13 +191,14 @@
       <div className={css.layout}>
         <DisconnectedBarVisibilityHandler />
         <DisconnectedBar />
-        <header className={css['header']}>
+        <header className={css.header} onDoubleClick={this.onHeaderDoubleClick}>
           <div className={css['main-header']}>
             <h1 className={css.wordmark}>
               <a
                 title="Comm Home"
                 aria-label="Go to Comm Home"
                 onClick={this.onWordmarkClicked}
+                onDoubleClick={this.stopDoubleClickPropagation}
               >
                 Comm
               </a>
diff --git a/web/components/navigation-arrows.react.js b/web/components/navigation-arrows.react.js
--- a/web/components/navigation-arrows.react.js
+++ b/web/components/navigation-arrows.react.js
@@ -8,6 +8,8 @@
 import SWMansionIcon from '../SWMansionIcon.react.js';
 import css from './navigation-arrows.css';
 
+const stopDoubleClickPropagation = e => e.stopPropagation();
+
 function NavigationArrows(): React.Node {
   const goBack = React.useCallback(
     () => history.getHistoryObject().goBack(),
@@ -37,10 +39,18 @@
 
   return (
     <div className={css.container}>
-      <a className={goBackClasses} onClick={goBack}>
+      <a
+        className={goBackClasses}
+        onClick={goBack}
+        onDoubleClick={stopDoubleClickPropagation}
+      >
         <SWMansionIcon icon="arrow-left" size={24} />
       </a>
-      <a className={goForwardClasses} onClick={goForward}>
+      <a
+        className={goForwardClasses}
+        onClick={goForward}
+        onDoubleClick={stopDoubleClickPropagation}
+      >
         <SWMansionIcon icon="arrow-right" size={24} />
       </a>
     </div>
diff --git a/web/electron.js b/web/electron.js
--- a/web/electron.js
+++ b/web/electron.js
@@ -11,6 +11,7 @@
   // Returns a callback that you can call to remove the listener
   +onNavigate: OnNavigateListener => () => void,
   +clearHistory: () => void,
+  +doubleClickTopBar: () => void,
 } = typeof electronContextBridge === 'undefined' ? null : electronContextBridge;
 
 export default electron;