diff --git a/apps/browser/src/_locales/en/messages.json b/apps/browser/src/_locales/en/messages.json
index 3a8c7f14bc0..e8834b3ffdb 100644
--- a/apps/browser/src/_locales/en/messages.json
+++ b/apps/browser/src/_locales/en/messages.json
@@ -5403,5 +5403,9 @@
   },
   "noPermissionsViewPage": {
     "message": "You do not have permissions to view this page. Try logging in with a different account."
+  },
+  "wasmNotSupported": {
+    "message": "WebAssembly is not supported on your browser or is not enabled. WebAssembly is required to use the Bitwarden app.",
+    "description": "'WebAssembly' is a technical term and should not be translated."
   }
 }
diff --git a/apps/browser/src/platform/services/sdk/browser-sdk-load.service.ts b/apps/browser/src/platform/services/sdk/browser-sdk-load.service.ts
index 409ff0dea06..3ad6dc2583d 100644
--- a/apps/browser/src/platform/services/sdk/browser-sdk-load.service.ts
+++ b/apps/browser/src/platform/services/sdk/browser-sdk-load.service.ts
@@ -35,9 +35,9 @@ if (BrowserApi.isManifestVersion(3)) {
     console.info("WebAssembly is supported in this environment");
     loadingPromise = import("./wasm");
   } else {
-    // eslint-disable-next-line no-console
-    console.info("WebAssembly is not supported in this environment");
-    loadingPromise = import("./fallback");
+    loadingPromise = new Promise((_, reject) => {
+      reject(new Error("WebAssembly is not supported in this environment"));
+    });
   }
 }
 
@@ -51,9 +51,7 @@ async function importModule(): Promise<GlobalWithWasmInit["initSdk"]> {
     console.info("WebAssembly is supported in this environment");
     await import("./wasm");
   } else {
-    // eslint-disable-next-line no-console
-    console.info("WebAssembly is not supported in this environment");
-    await import("./fallback");
+    throw new Error("WebAssembly is not supported in this environment");
   }
 
   // the wasm and fallback imports mutate globalThis to add the initSdk function
diff --git a/apps/browser/src/platform/services/sdk/fallback.ts b/apps/browser/src/platform/services/sdk/fallback.ts
deleted file mode 100644
index cee3598feda..00000000000
--- a/apps/browser/src/platform/services/sdk/fallback.ts
+++ /dev/null
@@ -1,8 +0,0 @@
-import * as sdk from "@bitwarden/sdk-internal";
-import * as wasm from "@bitwarden/sdk-internal/bitwarden_wasm_internal_bg.wasm.js";
-
-import { GlobalWithWasmInit } from "./browser-sdk-load.service";
-
-(globalThis as GlobalWithWasmInit).initSdk = () => {
-  (sdk as any).init(wasm);
-};
diff --git a/apps/browser/src/popup/app.component.ts b/apps/browser/src/popup/app.component.ts
index b6d3615af94..6a26476de43 100644
--- a/apps/browser/src/popup/app.component.ts
+++ b/apps/browser/src/popup/app.component.ts
@@ -11,7 +11,17 @@ import {
 } from "@angular/core";
 import { takeUntilDestroyed } from "@angular/core/rxjs-interop";
 import { NavigationEnd, Router, RouterOutlet } from "@angular/router";
-import { Subject, takeUntil, firstValueFrom, concatMap, filter, tap, map } from "rxjs";
+import {
+  Subject,
+  takeUntil,
+  firstValueFrom,
+  concatMap,
+  filter,
+  tap,
+  catchError,
+  of,
+  map,
+} from "rxjs";
 
 import { DeviceTrustToastService } from "@bitwarden/angular/auth/services/device-trust-toast.service.abstraction";
 import { DocumentLangSetter } from "@bitwarden/angular/platform/i18n";
@@ -23,6 +33,7 @@ import { AnimationControlService } from "@bitwarden/common/platform/abstractions
 import { I18nService } from "@bitwarden/common/platform/abstractions/i18n.service";
 import { LogService } from "@bitwarden/common/platform/abstractions/log.service";
 import { PlatformUtilsService } from "@bitwarden/common/platform/abstractions/platform-utils.service";
+import { SdkService } from "@bitwarden/common/platform/abstractions/sdk/sdk.service";
 import { StateService } from "@bitwarden/common/platform/abstractions/state.service";
 import { MessageListener } from "@bitwarden/common/platform/messaging";
 import { UserId } from "@bitwarden/common/types/guid";
@@ -48,23 +59,45 @@ import { DesktopSyncVerificationDialogComponent } from "./components/desktop-syn
   styles: [],
   animations: [routerTransition],
   template: `
-    <div [@routerTransition]="getRouteElevation(outlet)">
-      <router-outlet #outlet="outlet"></router-outlet>
-    </div>
-    <bit-toast-container></bit-toast-container>
+    @if (showSdkWarning | async) {
+      <div class="tw-h-screen tw-flex tw-justify-center tw-items-center tw-p-4">
+        <bit-callout type="danger">
+          {{ "wasmNotSupported" | i18n }}
+          <a
+            bitLink
+            href="https://bitwarden.com/help/wasm-not-supported/"
+            target="_blank"
+            rel="noreferrer"
+          >
+            {{ "learnMore" | i18n }}
+          </a>
+        </bit-callout>
+      </div>
+    } @else {
+      <div [@routerTransition]="getRouteElevation(outlet)">
+        <router-outlet #outlet="outlet"></router-outlet>
+      </div>
+      <bit-toast-container></bit-toast-container>
+    }
   `,
   standalone: false,
 })
 export class AppComponent implements OnInit, OnDestroy {
   private compactModeService = inject(PopupCompactModeService);
+  private sdkService = inject(SdkService);
 
   private lastActivity: Date;
   private activeUserId: UserId;
-  private recordActivitySubject = new Subject<void>();
   private routerAnimations = false;
 
   private destroy$ = new Subject<void>();
 
+  // Show a warning if the SDK is not available.
+  protected showSdkWarning = this.sdkService.client$.pipe(
+    map(() => false),
+    catchError(() => of(true)),
+  );
+
   constructor(
     private authService: AuthService,
     private i18nService: I18nService,
diff --git a/apps/browser/src/popup/app.module.ts b/apps/browser/src/popup/app.module.ts
index 8bea41da4d6..b400cb5eec8 100644
--- a/apps/browser/src/popup/app.module.ts
+++ b/apps/browser/src/popup/app.module.ts
@@ -20,6 +20,8 @@ import {
   ButtonModule,
   FormFieldModule,
   ToastModule,
+  CalloutModule,
+  LinkModule,
 } from "@bitwarden/components";
 
 import { AccountComponent } from "../auth/popup/account-switching/account.component";
@@ -87,6 +89,8 @@ import "../platform/popup/locales";
     CurrentAccountComponent,
     FormFieldModule,
     ExtensionAnonLayoutWrapperComponent,
+    CalloutModule,
+    LinkModule,
   ],
   declarations: [
     AppComponent,