diff --git a/aimenet-web/app/cards/page.tsx b/aimenet-web/app/cards/page.tsx
index b09a022..8350aca 100644
--- a/aimenet-web/app/cards/page.tsx
+++ b/aimenet-web/app/cards/page.tsx
@@ -17,25 +17,24 @@ import {
     ContextMenuTrigger
 } from "@/components/ui/context-menu";
 import {AimeCardEntry} from "@/components/aime-card";
+import {IncognitoStorageWarning} from "@/components/incognito-warning";
 
 function CardAddButton() {
-    return (
+    return (<>
+        <IncognitoStorageWarning/>
         <CardCreationDialog>
             <Button className="bg-blue-500">
                 <Plus className="mr-2 h-4 w-4"/> Add Card
             </Button>
         </CardCreationDialog>
-    );
+    </>);
 }
 
 function CardList(props: { cards: AimeCard[] | undefined }) {
-    if (!props.cards) {
-        return (<LoadingIndicator/>);
-    }
-
-    if (!props.cards.length) {
+    if (!props.cards?.length) {
         return (<>
             <CardAddButton/>
+
             <div className="flex flex-col gap-2 items-center text-gray-500 pt-6 pb-5">
                 <CreditCard className="h-8 w-8"/>
                 <span className="text-center">No cards found</span>
@@ -76,7 +75,7 @@ export default function CardManagerPage() {
             <Separator/>
 
             <div className="flex flex-col gap-4 w-full flex-grow">
-                <CardList cards={cards}/>
+                {cards ? <CardList cards={cards}/> : <LoadingIndicator/>}
             </div>
 
             <Footer/>
diff --git a/aimenet-web/components/incognito-warning.tsx b/aimenet-web/components/incognito-warning.tsx
new file mode 100644
index 0000000..a58e602
--- /dev/null
+++ b/aimenet-web/components/incognito-warning.tsx
@@ -0,0 +1,32 @@
+import {ServerOff} from "lucide-react";
+import detectIncognito from "detectincognitojs";
+import React, {useEffect, useState} from "react";
+import {Alert, AlertDescription, AlertTitle} from "@/components/ui/alert";
+
+export function IncognitoStorageWarning() {
+    const [showWarning, setShowWarning] = useState(false);
+
+    useEffect(() => {
+        const check = async () => {
+            try {
+                const {isPrivate} = await detectIncognito();
+                setShowWarning(isPrivate);
+            } catch {
+                setShowWarning(false);
+            }
+        };
+
+        check().catch(console.error);
+    }, []);
+
+    return (showWarning && (
+        <Alert variant="destructive">
+            <ServerOff className="h-4 w-4"/>
+            <AlertTitle>Private Session Detected</AlertTitle>
+            <AlertDescription>
+                You&apos;re currently using a private browsing session. When you close the tab, all data (including
+                cards) will be lost. Switch to a regular browsing session to ensure your data is saved.
+            </AlertDescription>
+        </Alert>
+    ));
+}
\ No newline at end of file
diff --git a/aimenet-web/package-lock.json b/aimenet-web/package-lock.json
index 273de41..74efe3f 100644
--- a/aimenet-web/package-lock.json
+++ b/aimenet-web/package-lock.json
@@ -16,8 +16,10 @@
         "@radix-ui/react-separator": "^1.1.0",
         "@radix-ui/react-slot": "^1.1.0",
         "@radix-ui/react-toast": "^1.2.1",
+        "@uidotdev/usehooks": "^2.4.1",
         "class-variance-authority": "^0.7.0",
         "clsx": "^2.1.1",
+        "detectincognitojs": "^1.3.5",
         "dexie": "^4.0.8",
         "dexie-react-hooks": "^1.1.7",
         "lucide-react": "^0.424.0",
@@ -1389,6 +1391,19 @@
         "url": "https://opencollective.com/typescript-eslint"
       }
     },
+    "node_modules/@uidotdev/usehooks": {
+      "version": "2.4.1",
+      "resolved": "https://registry.npmjs.org/@uidotdev/usehooks/-/usehooks-2.4.1.tgz",
+      "integrity": "sha512-1I+RwWyS+kdv3Mv0Vmc+p0dPYH0DTRAo04HLyXReYBL9AeseDWUJyi4THuksBJcu9F0Pih69Ak150VDnqbVnXg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=16"
+      },
+      "peerDependencies": {
+        "react": ">=18.0.0",
+        "react-dom": ">=18.0.0"
+      }
+    },
     "node_modules/@ungap/structured-clone": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/@ungap/structured-clone/-/structured-clone-1.2.0.tgz",
@@ -2152,6 +2167,12 @@
       "integrity": "sha512-ypdmJU/TbBby2Dxibuv7ZLW3Bs1QEmM7nHjEANfohJLvE0XVujisn1qPJcZxg+qDucsr+bP6fLD1rPS3AhJ7EQ==",
       "license": "MIT"
     },
+    "node_modules/detectincognitojs": {
+      "version": "1.3.5",
+      "resolved": "https://registry.npmjs.org/detectincognitojs/-/detectincognitojs-1.3.5.tgz",
+      "integrity": "sha512-jX5vs3toLR8aEtc5ChGC3xt0/0N+g6HpIWskcf+U1pYp4kiCdUABZLzQlkf2BVsx/Abgy9Eh9G3VV6P7p3iFiQ==",
+      "license": "MIT"
+    },
     "node_modules/dexie": {
       "version": "4.0.8",
       "resolved": "https://registry.npmjs.org/dexie/-/dexie-4.0.8.tgz",
diff --git a/aimenet-web/package.json b/aimenet-web/package.json
index c46e495..012ea7f 100644
--- a/aimenet-web/package.json
+++ b/aimenet-web/package.json
@@ -17,8 +17,10 @@
     "@radix-ui/react-separator": "^1.1.0",
     "@radix-ui/react-slot": "^1.1.0",
     "@radix-ui/react-toast": "^1.2.1",
+    "@uidotdev/usehooks": "^2.4.1",
     "class-variance-authority": "^0.7.0",
     "clsx": "^2.1.1",
+    "detectincognitojs": "^1.3.5",
     "dexie": "^4.0.8",
     "dexie-react-hooks": "^1.1.7",
     "lucide-react": "^0.424.0",