diff --git a/src/native/corehost/browserhost/host/cross-linked.ts b/src/native/corehost/browserhost/host/cross-linked.ts
deleted file mode 100644
index 81235d123da0ff..00000000000000
--- a/src/native/corehost/browserhost/host/cross-linked.ts
+++ /dev/null
@@ -1,12 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-
-import { } from "../../../libs/Common/JavaScript/cross-linked";
-import type { VoidPtr } from "./types";
-
-declare global {
-    export const BROWSER_HOST: any;
-    export function _BrowserHost_InitializeCoreCLR(): number;
-    export function _BrowserHost_ExecuteAssembly(mainAssemblyNamePtr: number, argsLength: number, argsPtr: number): number;
-    export function _wasm_load_icu_data(dataPtr: VoidPtr): number;
-}
diff --git a/src/native/corehost/browserhost/host/host.ts b/src/native/corehost/browserhost/host/host.ts
index 32c4cfd2447c97..88a2664e4c94a6 100644
--- a/src/native/corehost/browserhost/host/host.ts
+++ b/src/native/corehost/browserhost/host/host.ts
@@ -2,48 +2,48 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 import type { CharPtr, VfsAsset, VoidPtr, VoidPtrPtr } from "./types";
-import { } from "./cross-linked"; // ensure ambient symbols are declared
+import { _ems_ } from "../../../libs/Common/JavaScript/ems-ambient";
 
 const loadedAssemblies: Map<string, { ptr: number, length: number }> = new Map();
 
 export function registerDllBytes(bytes: Uint8Array, asset: { name: string, virtualPath: string }) {
-    const sp = Module.stackSave();
+    const sp = _ems_.Module.stackSave();
     try {
         const sizeOfPtr = 4;
-        const ptrPtr = Module.stackAlloc(sizeOfPtr);
-        if (Module._posix_memalign(ptrPtr as any, 16, bytes.length)) {
+        const ptrPtr = _ems_.Module.stackAlloc(sizeOfPtr);
+        if (_ems_.Module._posix_memalign(ptrPtr as any, 16, bytes.length)) {
             throw new Error("posix_memalign failed");
         }
 
-        const ptr = Module.HEAPU32[ptrPtr as any >>> 2];
-        Module.HEAPU8.set(bytes, ptr >>> 0);
+        const ptr = _ems_.Module.HEAPU32[ptrPtr as any >>> 2];
+        _ems_.Module.HEAPU8.set(bytes, ptr >>> 0);
         loadedAssemblies.set(asset.virtualPath, { ptr, length: bytes.length });
         if (!asset.virtualPath.startsWith("/")) {
             loadedAssemblies.set("/" + asset.virtualPath, { ptr, length: bytes.length });
         }
     } finally {
-        Module.stackRestore(sp);
+        _ems_.Module.stackRestore(sp);
     }
 }
 
 export function loadIcuData(bytes: Uint8Array) {
-    const sp = Module.stackSave();
+    const sp = _ems_.Module.stackSave();
     try {
         const sizeOfPtr = 4;
-        const ptrPtr = Module.stackAlloc(sizeOfPtr);
-        if (Module._posix_memalign(ptrPtr as any, 16, bytes.length)) {
+        const ptrPtr = _ems_.Module.stackAlloc(sizeOfPtr);
+        if (_ems_.Module._posix_memalign(ptrPtr as any, 16, bytes.length)) {
             throw new Error("posix_memalign failed for ICU data");
         }
 
-        const ptr = Module.HEAPU32[ptrPtr as any >>> 2];
-        Module.HEAPU8.set(bytes, ptr >>> 0);
+        const ptr = _ems_.Module.HEAPU32[ptrPtr as any >>> 2];
+        _ems_.Module.HEAPU8.set(bytes, ptr >>> 0);
 
-        const result = _wasm_load_icu_data(ptr as unknown as VoidPtr);
+        const result = _ems_._wasm_load_icu_data(ptr as unknown as VoidPtr);
         if (!result) {
             throw new Error("Failed to initialize ICU data");
         }
     } finally {
-        Module.stackRestore(sp);
+        _ems_.Module.stackRestore(sp);
     }
 }
 
@@ -68,89 +68,89 @@ export function installVfsFile(bytes: Uint8Array, asset: VfsAsset) {
             throw new Error("Cannot create files under /managed virtual directory as it is reserved for NodeFS mounting");
         }
 
-        dotnetLogger.debug(`Creating directory '${parentDirectory}'`);
+        _ems_.dotnetLogger.debug(`Creating directory '${parentDirectory}'`);
 
-        Module.FS_createPath(
+        _ems_.Module.FS_createPath(
             "/", parentDirectory, true, true // fixme: should canWrite be false?
         );
     } else {
         parentDirectory = "/";
     }
 
-    dotnetLogger.debug(`Creating file '${fileName}' in directory '${parentDirectory}'`);
+    _ems_.dotnetLogger.debug(`Creating file '${fileName}' in directory '${parentDirectory}'`);
 
-    Module.FS_createDataFile(
+    _ems_.Module.FS_createDataFile(
         parentDirectory, fileName,
         bytes, true /* canRead */, true /* canWrite */, true /* canOwn */
     );
 }
 
 export function initializeCoreCLR(): number {
-    return _BrowserHost_InitializeCoreCLR();
+    return _ems_._BrowserHost_InitializeCoreCLR();
 }
 
 // bool BrowserHost_ExternalAssemblyProbe(const char* pathPtr, /*out*/ void **outDataStartPtr, /*out*/ int64_t* outSize);
 export function BrowserHost_ExternalAssemblyProbe(pathPtr: CharPtr, outDataStartPtr: VoidPtrPtr, outSize: VoidPtr) {
-    const path = Module.UTF8ToString(pathPtr);
+    const path = _ems_.Module.UTF8ToString(pathPtr);
     const assembly = loadedAssemblies.get(path);
     if (assembly) {
-        Module.HEAPU32[outDataStartPtr as any >>> 2] = assembly.ptr;
+        _ems_.Module.HEAPU32[outDataStartPtr as any >>> 2] = assembly.ptr;
         // int64_t target
-        Module.HEAPU32[outSize as any >>> 2] = assembly.length;
-        Module.HEAPU32[((outSize as any) + 4) >>> 2] = 0;
+        _ems_.Module.HEAPU32[outSize as any >>> 2] = assembly.length;
+        _ems_.Module.HEAPU32[((outSize as any) + 4) >>> 2] = 0;
         return true;
     }
-    dotnetLogger.debug(`Assembly not found: '${path}'`);
-    Module.HEAPU32[outDataStartPtr as any >>> 2] = 0;
-    Module.HEAPU32[outSize as any >>> 2] = 0;
-    Module.HEAPU32[((outSize as any) + 4) >>> 2] = 0;
+    _ems_.dotnetLogger.debug(`Assembly not found: '${path}'`);
+    _ems_.Module.HEAPU32[outDataStartPtr as any >>> 2] = 0;
+    _ems_.Module.HEAPU32[outSize as any >>> 2] = 0;
+    _ems_.Module.HEAPU32[((outSize as any) + 4) >>> 2] = 0;
     return false;
 }
 
 export async function runMain(mainAssemblyName?: string, args?: string[]): Promise<number> {
     try {
-        const config = dotnetApi.getConfig();
+        const config = _ems_.dotnetApi.getConfig();
         if (!mainAssemblyName) {
             mainAssemblyName = config.mainAssemblyName!;
         }
         if (!mainAssemblyName.endsWith(".dll")) {
             mainAssemblyName += ".dll";
         }
-        const mainAssemblyNamePtr = dotnetBrowserUtilsExports.stringToUTF8Ptr(mainAssemblyName) as any;
+        const mainAssemblyNamePtr = _ems_.dotnetBrowserUtilsExports.stringToUTF8Ptr(mainAssemblyName) as any;
 
         args ??= [];
 
-        const sp = Module.stackSave();
-        const argsvPtr: number = Module.stackAlloc((args.length + 1) * 4) as any;
+        const sp = _ems_.Module.stackSave();
+        const argsvPtr: number = _ems_.Module.stackAlloc((args.length + 1) * 4) as any;
         const ptrs: VoidPtr[] = [];
         try {
 
             for (let i = 0; i < args.length; i++) {
-                const ptr = dotnetBrowserUtilsExports.stringToUTF8Ptr(args[i]) as any;
+                const ptr = _ems_.dotnetBrowserUtilsExports.stringToUTF8Ptr(args[i]) as any;
                 ptrs.push(ptr);
-                Module.HEAPU32[(argsvPtr >>> 2) + i] = ptr;
+                _ems_.Module.HEAPU32[(argsvPtr >>> 2) + i] = ptr;
             }
-            const res = _BrowserHost_ExecuteAssembly(mainAssemblyNamePtr, args.length, argsvPtr);
+            const res = _ems_._BrowserHost_ExecuteAssembly(mainAssemblyNamePtr, args.length, argsvPtr);
             for (const ptr of ptrs) {
-                Module._free(ptr);
+                _ems_.Module._free(ptr);
             }
 
             if (res != 0) {
                 const reason = new Error("Failed to execute assembly");
-                dotnetApi.exit(res, reason);
+                _ems_.dotnetApi.exit(res, reason);
                 throw reason;
             }
 
-            return dotnetLoaderExports.getRunMainPromise();
+            return _ems_.dotnetLoaderExports.getRunMainPromise();
         } finally {
-            Module.stackRestore(sp);
+            _ems_.Module.stackRestore(sp);
         }
     } catch (error: any) {
         // if the error is an ExitStatus, use its status code
         if (error && typeof error.status === "number") {
             return error.status;
         }
-        dotnetApi.exit(1, error);
+        _ems_.dotnetApi.exit(1, error);
         throw error;
     }
 }
@@ -158,11 +158,11 @@ export async function runMain(mainAssemblyName?: string, args?: string[]): Promi
 export async function runMainAndExit(mainAssemblyName?: string, args?: string[]): Promise<number> {
     const res = await runMain(mainAssemblyName, args);
     try {
-        dotnetApi.exit(0, null);
+        _ems_.dotnetApi.exit(0, null);
     } catch (error: any) {
         // do not propagate ExitStatus exception
         if (error.status === undefined) {
-            dotnetApi.exit(1, error);
+            _ems_.dotnetApi.exit(1, error);
             throw error;
         }
     }
diff --git a/src/native/corehost/browserhost/host/index.ts b/src/native/corehost/browserhost/host/index.ts
index 3eadb4cb94c3c6..a957f8b37acd32 100644
--- a/src/native/corehost/browserhost/host/index.ts
+++ b/src/native/corehost/browserhost/host/index.ts
@@ -3,7 +3,7 @@
 
 import type { InternalExchange, BrowserHostExports, RuntimeAPI, BrowserHostExportsTable } from "./types";
 import { InternalExchangeIndex } from "./types";
-import { } from "./cross-linked"; // ensure ambient symbols are declared
+import { _ems_ } from "../../../libs/Common/JavaScript/ems-ambient";
 
 import GitHash from "consts:gitHash";
 
@@ -28,7 +28,7 @@ export function dotnetInitializeModule(internals: InternalExchange): void {
         loadIcuData,
         initializeCoreCLR,
     });
-    dotnetUpdateInternals(internals, dotnetUpdateInternalsSubscriber);
+    _ems_.dotnetUpdateInternals(internals, _ems_.dotnetUpdateInternalsSubscriber);
     function browserHostExportsToTable(map: BrowserHostExports): BrowserHostExportsTable {
         // keep in sync with browserHostExportsFromTable()
         return [
diff --git a/src/native/corehost/browserhost/libBrowserHost.footer.js b/src/native/corehost/browserhost/libBrowserHost.footer.js
index 02f755ede4ecfa..b37e57dcea93da 100644
--- a/src/native/corehost/browserhost/libBrowserHost.footer.js
+++ b/src/native/corehost/browserhost/libBrowserHost.footer.js
@@ -76,10 +76,6 @@
             if (name === "dotnetInitializeModule") continue;
             lib[name] = () => "dummy";
             assignExportsBuilder += `_${String(name)} = exports.${String(name)};\n`;
-            const fn = exports[name];
-            if (fn.__deps) {
-                lib[name + "__deps"] = fn.__deps;
-            }
         }
         lib.$BROWSER_HOST.assignExports = new Function("exports", assignExportsBuilder);
 
diff --git a/src/native/corehost/browserhost/loader/assets.ts b/src/native/corehost/browserhost/loader/assets.ts
index 779555ec24bb22..0d2d36dee0c011 100644
--- a/src/native/corehost/browserhost/loader/assets.ts
+++ b/src/native/corehost/browserhost/loader/assets.ts
@@ -1,16 +1,21 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
-import type { JsModuleExports, JsAsset, AssemblyAsset, WasmAsset, IcuAsset, EmscriptenModuleInternal, InstantiateWasmSuccessCallback, WebAssemblyBootResourceType, AssetEntryInternal } from "./types";
+import type { JsModuleExports, JsAsset, AssemblyAsset, WasmAsset, IcuAsset, EmscriptenModuleInternal, InstantiateWasmSuccessCallback, WebAssemblyBootResourceType, AssetEntryInternal, LoadBootResourceCallback } from "./types";
 
-import { dotnetAssert, dotnetGetInternals, dotnetBrowserHostExports, dotnetUpdateInternals } from "./cross-module";
+import { dotnetAssert, dotnetGetInternals, dotnetBrowserHostExports, dotnetUpdateInternals, dotnetLogger } from "./cross-module";
 import { ENVIRONMENT_IS_WEB } from "./per-module";
 import { createPromiseCompletionSource } from "./promise-completion-source";
 import { locateFile, makeURLAbsoluteWithApplicationBase } from "./bootstrap";
 import { fetchLike } from "./polyfills";
-import { loadBootResourceCallback } from "./host-builder";
 import { loaderConfig } from "./config";
 
+let loadBootResourceCallback: LoadBootResourceCallback | undefined = undefined;
+
+export function setLoadBootResourceCallback(callback: LoadBootResourceCallback | undefined): void {
+    loadBootResourceCallback = callback;
+}
+
 export let wasmBinaryPromise: Promise<Response> | undefined = undefined;
 export const nativeModulePromiseController = createPromiseCompletionSource<EmscriptenModuleInternal>(() => {
     dotnetUpdateInternals(dotnetGetInternals());
diff --git a/src/native/corehost/browserhost/loader/dotnet.d.ts b/src/native/corehost/browserhost/loader/dotnet.d.ts
index de8cd3331a3539..592a9ca70240e0 100644
--- a/src/native/corehost/browserhost/loader/dotnet.d.ts
+++ b/src/native/corehost/browserhost/loader/dotnet.d.ts
@@ -1,6 +1,6 @@
 //! Licensed to the .NET Foundation under one or more agreements.
 //! The .NET Foundation licenses this file to you under the MIT license.
-//! This is generated file, see src/native/libs/Browser/rollup.config.defines.js
+//! This is generated file, see src/native/rollup.config.js
 
 //! This is not considered public API with backward compatibility guarantees. 
 
diff --git a/src/native/corehost/browserhost/loader/host-builder.ts b/src/native/corehost/browserhost/loader/host-builder.ts
index a77cc59ab82504..062de202cda9fe 100644
--- a/src/native/corehost/browserhost/loader/host-builder.ts
+++ b/src/native/corehost/browserhost/loader/host-builder.ts
@@ -7,9 +7,9 @@ import { Module, dotnetApi } from "./cross-module";
 import { getLoaderConfig, mergeLoaderConfig, validateLoaderConfig } from "./config";
 import { createRuntime } from "./run";
 import { exit } from "./exit";
+import { setLoadBootResourceCallback } from "./assets";
 
 let applicationArguments: string[] | undefined = [];
-export let loadBootResourceCallback: LoadBootResourceCallback | undefined = undefined;
 
 /* eslint-disable @typescript-eslint/no-unused-vars */
 export class HostBuilder implements DotnetHostBuilder {
@@ -89,7 +89,7 @@ export class HostBuilder implements DotnetHostBuilder {
         return this;
     }
     withResourceLoader(loadBootResource?: LoadBootResourceCallback): DotnetHostBuilder {
-        loadBootResourceCallback = loadBootResource;
+        setLoadBootResourceCallback(loadBootResource);
         return this;
     }
 
diff --git a/src/native/libs/Common/JavaScript/CMakeLists.txt b/src/native/libs/Common/JavaScript/CMakeLists.txt
index 91ab7c508d7dc1..b44a8d4f1700e2 100644
--- a/src/native/libs/Common/JavaScript/CMakeLists.txt
+++ b/src/native/libs/Common/JavaScript/CMakeLists.txt
@@ -17,7 +17,6 @@ set(ROLLUP_TS_SOURCES
     "${CLR_SRC_NATIVE_DIR}/libs/System.Native.Browser/libSystem.Native.Browser.footer.js"
     "${CLR_SRC_NATIVE_DIR}/libs/System.Runtime.InteropServices.JavaScript.Native/libSystem.Runtime.InteropServices.JavaScript.Native.footer.js"
 
-    "${CLR_SRC_NATIVE_DIR}/corehost/browserhost/host/cross-linked.ts"
     "${CLR_SRC_NATIVE_DIR}/corehost/browserhost/host/host.ts"
     "${CLR_SRC_NATIVE_DIR}/corehost/browserhost/host/index.ts"
     "${CLR_SRC_NATIVE_DIR}/corehost/browserhost/host/types.ts"
@@ -39,7 +38,7 @@ set(ROLLUP_TS_SOURCES
     "${CLR_SRC_NATIVE_DIR}/corehost/browserhost/loader/run.ts"
     "${CLR_SRC_NATIVE_DIR}/corehost/browserhost/loader/types.ts"
     "${CLR_SRC_NATIVE_DIR}/corehost/browserhost/types.ts"
-    "${CLR_SRC_NATIVE_DIR}/libs/Common/JavaScript/cross-linked/index.ts"
+    "${CLR_SRC_NATIVE_DIR}/libs/Common/JavaScript/ems-ambient/index.ts"
     "${CLR_SRC_NATIVE_DIR}/libs/Common/JavaScript/cross-module/index.ts"
     "${CLR_SRC_NATIVE_DIR}/libs/Common/JavaScript/per-module/index.ts"
     "${CLR_SRC_NATIVE_DIR}/libs/Common/JavaScript/types/consts.d.ts"
@@ -59,7 +58,6 @@ set(ROLLUP_TS_SOURCES
     "${CLR_SRC_NATIVE_DIR}/libs/System.Native.Browser/diagnostics/per-module.ts"
     "${CLR_SRC_NATIVE_DIR}/libs/System.Native.Browser/diagnostics/symbolicate.ts"
     "${CLR_SRC_NATIVE_DIR}/libs/System.Native.Browser/diagnostics/types.ts"
-    "${CLR_SRC_NATIVE_DIR}/libs/System.Native.Browser/native/cross-linked.ts"
     "${CLR_SRC_NATIVE_DIR}/libs/System.Native.Browser/native/crypto.ts"
     "${CLR_SRC_NATIVE_DIR}/libs/System.Native.Browser/native/globalization-locale.ts"
     "${CLR_SRC_NATIVE_DIR}/libs/System.Native.Browser/native/index.ts"
@@ -69,7 +67,6 @@ set(ROLLUP_TS_SOURCES
     "${CLR_SRC_NATIVE_DIR}/libs/System.Native.Browser/types.ts"
     "${CLR_SRC_NATIVE_DIR}/libs/System.Native.Browser/utils/cdac.ts"
     "${CLR_SRC_NATIVE_DIR}/libs/System.Native.Browser/utils/cross-module.ts"
-    "${CLR_SRC_NATIVE_DIR}/libs/System.Native.Browser/utils/cross-linked.ts"
     "${CLR_SRC_NATIVE_DIR}/libs/System.Native.Browser/utils/host.ts"
     "${CLR_SRC_NATIVE_DIR}/libs/System.Native.Browser/utils/index.ts"
     "${CLR_SRC_NATIVE_DIR}/libs/System.Native.Browser/utils/memory.ts"
@@ -84,7 +81,6 @@ set(ROLLUP_TS_SOURCES
     "${CLR_SRC_NATIVE_DIR}/libs/System.Runtime.InteropServices.JavaScript.Native/interop/per-module.ts"
     "${CLR_SRC_NATIVE_DIR}/libs/System.Runtime.InteropServices.JavaScript.Native/interop/types.ts"
     "${CLR_SRC_NATIVE_DIR}/libs/System.Runtime.InteropServices.JavaScript.Native/interop/weak-ref.ts"
-    "${CLR_SRC_NATIVE_DIR}/libs/System.Runtime.InteropServices.JavaScript.Native/native/cross-linked.ts"
     "${CLR_SRC_NATIVE_DIR}/libs/System.Runtime.InteropServices.JavaScript.Native/native/index.ts"
     "${CLR_SRC_NATIVE_DIR}/libs/System.Runtime.InteropServices.JavaScript.Native/types.ts"
 )
diff --git a/src/native/libs/Common/JavaScript/cross-linked/index.ts b/src/native/libs/Common/JavaScript/cross-linked/index.ts
deleted file mode 100644
index 2700568e6bada0..00000000000000
--- a/src/native/libs/Common/JavaScript/cross-linked/index.ts
+++ /dev/null
@@ -1,35 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-
-import type { AssertType, EmscriptenModuleInternal, LoggerType, LoaderExports, InternalExchange, InternalExchangeSubscriber, RuntimeAPI, BrowserUtilsExports, NativePointer, CharPtr, VoidPtr, RuntimeExports } from "../types";
-
-// we want to use the cross-module symbols defined in closure of dotnet.native.js
-// which are installed there by libSystem.Native.Browser.Utils.footer.js
-// see also `reserved` in `rollup.config.defines.js`
-declare global {
-    export const dotnetApi: RuntimeAPI;
-    export const dotnetAssert: AssertType;
-    export const dotnetLogger: LoggerType;
-    export const dotnetLoaderExports: LoaderExports;
-    export const dotnetRuntimeExports: RuntimeExports;
-    export const dotnetBrowserUtilsExports: BrowserUtilsExports;
-    export const dotnetUpdateInternals: (internals?: Partial<InternalExchange>, subscriber?: InternalExchangeSubscriber) => void;
-    export const dotnetUpdateInternalsSubscriber: (internals: InternalExchange) => void;
-
-    // ambient in the emscripten closure
-    export const Module: EmscriptenModuleInternal;
-    export const ENVIRONMENT_IS_NODE: boolean;
-    export const ENVIRONMENT_IS_SHELL: boolean;
-    export const ENVIRONMENT_IS_WEB: boolean;
-    export const ENVIRONMENT_IS_WORKER: boolean;
-    export const ENVIRONMENT_IS_SIDECAR: boolean;
-
-    export const VoidPtrNull: VoidPtr;
-    export const CharPtrNull: CharPtr;
-    export const NativePointerNull: NativePointer;
-
-    export function safeSetTimeout(func: Function, timeout: number): number;
-    export function maybeExit(): void;
-    export function exitJS(status: number, implicit?: boolean | number): void;
-
-}
diff --git a/src/native/libs/Common/JavaScript/cross-module/index.ts b/src/native/libs/Common/JavaScript/cross-module/index.ts
index 3c874892112764..f89b3a73f12793 100644
--- a/src/native/libs/Common/JavaScript/cross-module/index.ts
+++ b/src/native/libs/Common/JavaScript/cross-module/index.ts
@@ -19,10 +19,10 @@
  *  - each JS module to use exported symbols in ergonomic way
  */
 
-import type { DotnetModuleInternal, InternalExchange, RuntimeExports, LoaderExports, RuntimeAPI, LoggerType, AssertType, BrowserHostExports, InteropJavaScriptExports, LoaderExportsTable, RuntimeExportsTable, BrowserHostExportsTable, InteropJavaScriptExportsTable, NativeBrowserExports, NativeBrowserExportsTable, InternalExchangeSubscriber, BrowserUtilsExports, BrowserUtilsExportsTable, VoidPtr, CharPtr, NativePointer, DiagnosticsExports, DiagnosticsExportsTable } from "../types";
+import type { DotnetModuleInternal, InternalExchange, RuntimeExports, LoaderExports, RuntimeAPI, LoggerType, AssertType, BrowserHostExports, InteropJavaScriptExports, LoaderExportsTable, RuntimeExportsTable, BrowserHostExportsTable, InteropJavaScriptExportsTable, NativeBrowserExports, NativeBrowserExportsTable, InternalExchangeSubscriber, BrowserUtilsExports, BrowserUtilsExportsTable, DiagnosticsExports, DiagnosticsExportsTable } from "../types";
 import { InternalExchangeIndex } from "../types";
 
-let dotnetInternals: InternalExchange;
+export let dotnetInternals: InternalExchange;
 export let Module: DotnetModuleInternal;
 export let dotnetApi: RuntimeAPI;
 export const dotnetLogger: LoggerType = {} as LoggerType;
@@ -35,10 +35,6 @@ export const dotnetNativeBrowserExports: NativeBrowserExports = {} as any;
 export const dotnetBrowserUtilsExports: BrowserUtilsExports = {} as any;
 export const dotnetDiagnosticsExports: DiagnosticsExports = {} as any;
 
-export const VoidPtrNull: VoidPtr = <VoidPtr><any>0;
-export const CharPtrNull: CharPtr = <CharPtr><any>0;
-export const NativePointerNull: NativePointer = <NativePointer><any>0;
-
 export function dotnetGetInternals(): InternalExchange {
     return dotnetInternals;
 }
diff --git a/src/native/libs/Common/JavaScript/ems-ambient/index.ts b/src/native/libs/Common/JavaScript/ems-ambient/index.ts
new file mode 100644
index 00000000000000..66dc3d452c610c
--- /dev/null
+++ b/src/native/libs/Common/JavaScript/ems-ambient/index.ts
@@ -0,0 +1,53 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+import type { AssertType, EmscriptenModuleInternal, LoggerType, LoaderExports, InternalExchange, InternalExchangeSubscriber, RuntimeAPI, BrowserUtilsExports, VoidPtr, RuntimeExports } from "../types";
+
+// we want to use the cross-module symbols defined in closure of dotnet.native.js
+// which are installed there by libSystem.Native.Browser.Utils.footer.js
+// see also `reserved` in `rollup.config.defines.js`
+
+type emAmbientSymbolsType = {
+    dotnetApi: RuntimeAPI;
+    dotnetAssert: AssertType;
+    dotnetLogger: LoggerType;
+    dotnetLoaderExports: LoaderExports;
+    dotnetRuntimeExports: RuntimeExports;
+    dotnetBrowserUtilsExports: BrowserUtilsExports;
+
+    dotnetUpdateInternals: (internals?: Partial<InternalExchange>, subscriber?: InternalExchangeSubscriber) => void;
+    dotnetUpdateInternalsSubscriber: (internals: InternalExchange) => void;
+
+    _GetDotNetRuntimeContractDescriptor: () => void;
+    _SystemJS_ExecuteTimerCallback: () => void;
+    _SystemJS_ExecuteBackgroundJobCallback: () => void;
+    _BrowserHost_InitializeCoreCLR: () => number;
+    _BrowserHost_ExecuteAssembly: (mainAssemblyNamePtr: number, argsLength: number, argsPtr: number) => number;
+    _wasm_load_icu_data: (dataPtr: VoidPtr) => number;
+
+    DOTNET: any;
+    DOTNET_INTEROP: any;
+    BROWSER_HOST: any;
+
+    Module: EmscriptenModuleInternal;
+    ENVIRONMENT_IS_NODE: boolean;
+    ENVIRONMENT_IS_SHELL: boolean;
+    ENVIRONMENT_IS_WEB: boolean;
+    ENVIRONMENT_IS_WORKER: boolean;
+    ENVIRONMENT_IS_SIDECAR: boolean;
+    ABORT: boolean;
+    EXITSTATUS: number;
+
+    ExitStatus: (exitCode: number) => number;
+    _emscripten_force_exit: (exitCode: number) => void;
+    _exit: (exitCode: number, implicit?: boolean) => void;
+    safeSetTimeout: (func: Function, timeout: number) => number;
+    maybeExit: () => void;
+    exitJS: (status: number, implicit?: boolean | number) => void;
+    runtimeKeepalivePop: () => void;
+    runtimeKeepalivePush: () => void;
+}
+
+const _ems_: emAmbientSymbolsType = globalThis as any;
+//export default emAmbientSymbols;
+export { _ems_ };
diff --git a/src/native/libs/Common/JavaScript/per-module/index.ts b/src/native/libs/Common/JavaScript/per-module/index.ts
index 8858f9084f1885..585114e9875d90 100644
--- a/src/native/libs/Common/JavaScript/per-module/index.ts
+++ b/src/native/libs/Common/JavaScript/per-module/index.ts
@@ -1,9 +1,14 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+import type { VoidPtr, CharPtr, NativePointer } from "../types";
+
 export const ENVIRONMENT_IS_NODE = typeof process == "object" && typeof process.versions == "object" && typeof process.versions.node == "string";
 export const ENVIRONMENT_IS_WEB_WORKER = typeof importScripts == "function";
 export const ENVIRONMENT_IS_SIDECAR = ENVIRONMENT_IS_WEB_WORKER && typeof (globalThis as any).dotnetSidecar !== "undefined"; // sidecar is emscripten main running in a web worker
 export const ENVIRONMENT_IS_WORKER = ENVIRONMENT_IS_WEB_WORKER && !ENVIRONMENT_IS_SIDECAR; // we redefine what ENVIRONMENT_IS_WORKER, we replace it in emscripten internals, so that sidecar works
 export const ENVIRONMENT_IS_WEB = typeof window == "object" || (ENVIRONMENT_IS_WEB_WORKER && !ENVIRONMENT_IS_NODE);
 export const ENVIRONMENT_IS_SHELL = !ENVIRONMENT_IS_WEB && !ENVIRONMENT_IS_NODE;
+export const VoidPtrNull: VoidPtr = <VoidPtr><any>0;
+export const CharPtrNull: CharPtr = <CharPtr><any>0;
+export const NativePointerNull: NativePointer = <NativePointer><any>0;
diff --git a/src/native/libs/System.Native.Browser/libSystem.Native.Browser.Utils.footer.js b/src/native/libs/System.Native.Browser/libSystem.Native.Browser.Utils.footer.js
index 08148744a9ae80..ee6143a574de52 100644
--- a/src/native/libs/System.Native.Browser/libSystem.Native.Browser.Utils.footer.js
+++ b/src/native/libs/System.Native.Browser/libSystem.Native.Browser.Utils.footer.js
@@ -19,7 +19,7 @@
         const exports = {};
         libBrowserUtils(exports);
 
-        let commonDeps = ["$libBrowserUtilsFn", "$DOTNET", "emscripten_force_exit", "_exit"];
+        let commonDeps = ["$libBrowserUtilsFn", "$DOTNET", "emscripten_force_exit", "_exit", "GetDotNetRuntimeContractDescriptor"];
         const lib = {
             $BROWSER_UTILS: {
                 selfInitialize: () => {
@@ -37,13 +37,14 @@
             $BROWSER_UTILS__deps: commonDeps,
         };
 
+        // install cross-module symbols as "_ems_" ambient symbols in Emscripten closure
         // keep in sync with `reserved`+`keep_fnames` in src\native\rollup.config.defines.js
-        for (const exportName of Reflect.ownKeys(exports.cross)) {
+        for (const exportName of Reflect.ownKeys(exports._ems_ambient_)) {
             const name = String(exportName);
             if (name === "dotnetInternals") continue;
             if (name === "Module") continue;
             const emName = "$" + name;
-            lib[emName] = exports.cross[exportName];
+            lib[emName] = exports._ems_ambient_[exportName];
             commonDeps.push(emName);
         }
 
diff --git a/src/native/libs/System.Native.Browser/libSystem.Native.Browser.footer.js b/src/native/libs/System.Native.Browser/libSystem.Native.Browser.footer.js
index ff5f4523b1fc12..c7e48d369fea58 100644
--- a/src/native/libs/System.Native.Browser/libSystem.Native.Browser.footer.js
+++ b/src/native/libs/System.Native.Browser/libSystem.Native.Browser.footer.js
@@ -19,7 +19,7 @@
         const exports = {};
         libNativeBrowser(exports);
 
-        let commonDeps = ["$BROWSER_UTILS", "GetDotNetRuntimeContractDescriptor"];
+        let commonDeps = ["$BROWSER_UTILS", "SystemJS_ExecuteTimerCallback", "SystemJS_ExecuteBackgroundJobCallback"];
         const lib = {
             $DOTNET: {
                 selfInitialize: () => {
@@ -37,11 +37,8 @@
 
         for (const exportName of Reflect.ownKeys(exports)) {
             const name = String(exportName);
-            if (name === "dotnetInitializeModule" || name === "gitHash") continue;
-            const fn = lib[name] = exports[name];
-            if (fn.__deps) {
-                lib[name + "__deps"] = fn.__deps;
-            }
+            if (name === "dotnetInitializeModule") continue;
+            lib[name] = exports[name];
         }
 
         autoAddDeps(lib, "$DOTNET");
diff --git a/src/native/libs/System.Native.Browser/native/cross-linked.ts b/src/native/libs/System.Native.Browser/native/cross-linked.ts
deleted file mode 100644
index ca55149e376530..00000000000000
--- a/src/native/libs/System.Native.Browser/native/cross-linked.ts
+++ /dev/null
@@ -1,13 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-
-
-import { } from "../../Common/JavaScript/cross-linked";
-declare global {
-    export const DOTNET: any;
-    export function _emscripten_force_exit(exitCode: number): void;
-    export function _exit(exitCode: number, implicit?: boolean): void;
-    export function _GetDotNetRuntimeContractDescriptor(): void;
-    export function _SystemJS_ExecuteTimerCallback(): void;
-    export function _SystemJS_ExecuteBackgroundJobCallback(): void;
-}
diff --git a/src/native/libs/System.Native.Browser/native/crypto.ts b/src/native/libs/System.Native.Browser/native/crypto.ts
index 2143d94ad20b47..6c977cf8158fed 100644
--- a/src/native/libs/System.Native.Browser/native/crypto.ts
+++ b/src/native/libs/System.Native.Browser/native/crypto.ts
@@ -1,7 +1,8 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
-import { } from "./cross-linked"; // ensure ambient symbols are declared
+import { _ems_ } from "../../Common/JavaScript/ems-ambient";
+
 
 export function SystemJS_RandomBytes(bufferPtr: number, bufferLength: number): number {
     // batchedQuotaMax is the max number of bytes as specified by the api spec.
@@ -11,18 +12,18 @@ export function SystemJS_RandomBytes(bufferPtr: number, bufferLength: number): n
 
     if (!globalThis.crypto || !globalThis.crypto.getRandomValues) {
         if (!(globalThis as any)["cryptoWarnOnce"]) {
-            dotnetLogger.warn("This engine doesn't support crypto.getRandomValues. Please use a modern version or provide polyfill for 'globalThis.crypto.getRandomValues'.");
+            _ems_.dotnetLogger.warn("This engine doesn't support crypto.getRandomValues. Please use a modern version or provide polyfill for 'globalThis.crypto.getRandomValues'.");
             (globalThis as any)["cryptoWarnOnce"] = true;
         }
         return -1;
     }
 
     bufferPtr = bufferPtr >>> 0;
-    const memoryView = dotnetApi.localHeapViewU8();
+    const memoryView = _ems_.dotnetApi.localHeapViewU8();
     const targetView = memoryView.subarray(bufferPtr, bufferPtr + bufferLength);
 
     // When threading is enabled, Chrome doesn't want SharedArrayBuffer to be passed to crypto APIs
-    const needsCopy = dotnetBrowserUtilsExports.isSharedArrayBuffer(memoryView.buffer);
+    const needsCopy = _ems_.dotnetBrowserUtilsExports.isSharedArrayBuffer(memoryView.buffer);
     const targetBuffer = needsCopy
         ? new Uint8Array(bufferLength)
         : targetView;
diff --git a/src/native/libs/System.Native.Browser/native/globalization-locale.ts b/src/native/libs/System.Native.Browser/native/globalization-locale.ts
index 0687aa5b44c7c0..f8622ae731df08 100644
--- a/src/native/libs/System.Native.Browser/native/globalization-locale.ts
+++ b/src/native/libs/System.Native.Browser/native/globalization-locale.ts
@@ -2,21 +2,21 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 import { Int32Ptr, VoidPtr } from "../types";
-import { } from "./cross-linked"; // ensure ambient symbols are declared
+import { _ems_ } from "../../Common/JavaScript/ems-ambient";
 
 // char16_t* SystemJS_GetLocaleInfo (const uint16_t* locale, int32_t localeLength, const uint16_t* culture, int32_t cultureLength, const uint16_t* result, int32_t resultMaxLength, int *resultLength);
 export function SystemJS_GetLocaleInfo(culture: number, cultureLength: number, locale: number, localeLength: number, dst: number, dstMaxLength: number, dstLength: Int32Ptr): VoidPtr {
     const OUTER_SEPARATOR = "##";
     try {
-        const localeNameOriginal = dotnetBrowserUtilsExports.utf16ToString(<any>locale, <any>(locale + 2 * localeLength));
+        const localeNameOriginal = _ems_.dotnetBrowserUtilsExports.utf16ToString(<any>locale, <any>(locale + 2 * localeLength));
         const localeName = normalizeLocale(localeNameOriginal);
         if (!localeName && localeNameOriginal) {
             // handle non-standard or malformed locales by forwarding the locale code
-            dotnetBrowserUtilsExports.stringToUTF16(dst, dst + 2 * localeNameOriginal.length, localeNameOriginal);
-            dotnetApi.setHeapI32(dstLength, localeNameOriginal.length);
-            return VoidPtrNull;
+            _ems_.dotnetBrowserUtilsExports.stringToUTF16(dst, dst + 2 * localeNameOriginal.length, localeNameOriginal);
+            _ems_.dotnetApi.setHeapI32(dstLength, localeNameOriginal.length);
+            return 0 as any;
         }
-        const cultureNameOriginal = dotnetBrowserUtilsExports.utf16ToString(<any>culture, <any>(culture + 2 * cultureLength));
+        const cultureNameOriginal = _ems_.dotnetBrowserUtilsExports.utf16ToString(<any>culture, <any>(culture + 2 * cultureLength));
         const cultureName = normalizeLocale(cultureNameOriginal);
 
         if (!localeName || !cultureName)
@@ -43,9 +43,9 @@ export function SystemJS_GetLocaleInfo(culture: number, cultureLength: number, l
                 } catch (error) {
                     if (error instanceof RangeError && localeNameOriginal) {
                         // handle non-standard or malformed locales by forwarding the locale code, e.g. "xx-u-xx"
-                        dotnetBrowserUtilsExports.stringToUTF16(dst, dst + 2 * localeNameOriginal.length, localeNameOriginal);
-                        dotnetApi.setHeapI32(dstLength, localeNameOriginal.length);
-                        return VoidPtrNull;
+                        _ems_.dotnetBrowserUtilsExports.stringToUTF16(dst, dst + 2 * localeNameOriginal.length, localeNameOriginal);
+                        _ems_.dotnetApi.setHeapI32(dstLength, localeNameOriginal.length);
+                        return 0 as any;
                     }
                     throw error;
                 }
@@ -65,12 +65,12 @@ export function SystemJS_GetLocaleInfo(culture: number, cultureLength: number, l
         if (result.length > dstMaxLength)
             throw new Error(`Locale info for locale=${localeName} exceeds length of ${dstMaxLength}.`);
 
-        dotnetBrowserUtilsExports.stringToUTF16(dst, dst + 2 * result.length, result);
-        dotnetApi.setHeapI32(dstLength, result.length);
-        return VoidPtrNull;
+        _ems_.dotnetBrowserUtilsExports.stringToUTF16(dst, dst + 2 * result.length, result);
+        _ems_.dotnetApi.setHeapI32(dstLength, result.length);
+        return 0 as any;
     } catch (ex: any) {
-        dotnetApi.setHeapI32(dstLength, -1);
-        return dotnetBrowserUtilsExports.stringToUTF16Ptr(ex.toString());
+        _ems_.dotnetApi.setHeapI32(dstLength, -1);
+        return _ems_.dotnetBrowserUtilsExports.stringToUTF16Ptr(ex.toString());
     }
 
     function normalizeLocale(locale: string | null) {
diff --git a/src/native/libs/System.Native.Browser/native/index.ts b/src/native/libs/System.Native.Browser/native/index.ts
index 9bdecaacda58e8..bea996eb7202c5 100644
--- a/src/native/libs/System.Native.Browser/native/index.ts
+++ b/src/native/libs/System.Native.Browser/native/index.ts
@@ -4,6 +4,7 @@
 import type { InternalExchange, NativeBrowserExports, NativeBrowserExportsTable } from "../types";
 import { InternalExchangeIndex } from "../types";
 
+import { _ems_ } from "../../Common/JavaScript/ems-ambient";
 import GitHash from "consts:gitHash";
 
 export { SystemJS_RandomBytes } from "./crypto";
@@ -18,13 +19,13 @@ export function dotnetInitializeModule(internals: InternalExchange): void {
     const runtimeApi = internals[InternalExchangeIndex.RuntimeAPI];
     if (typeof runtimeApi !== "object") throw new Error("Expected internals to have RuntimeAPI");
 
-    if (runtimeApi.runtimeBuildInfo.gitHash && runtimeApi.runtimeBuildInfo.gitHash !== DOTNET.gitHash) {
-        throw new Error(`Mismatched git hashes between loader and runtime. Loader: ${runtimeApi.runtimeBuildInfo.gitHash}, DOTNET: ${DOTNET.gitHash}`);
+    if (runtimeApi.runtimeBuildInfo.gitHash && runtimeApi.runtimeBuildInfo.gitHash !== _ems_.DOTNET.gitHash) {
+        throw new Error(`Mismatched git hashes between loader and runtime. Loader: ${runtimeApi.runtimeBuildInfo.gitHash}, DOTNET: ${_ems_.DOTNET.gitHash}`);
     }
 
     internals[InternalExchangeIndex.NativeBrowserExportsTable] = nativeBrowserExportsToTable({
     });
-    dotnetUpdateInternals(internals, dotnetUpdateInternalsSubscriber);
+    _ems_.dotnetUpdateInternals(internals, _ems_.dotnetUpdateInternalsSubscriber);
 
     // eslint-disable-next-line @typescript-eslint/no-unused-vars
     function nativeBrowserExportsToTable(map: NativeBrowserExports): NativeBrowserExportsTable {
diff --git a/src/native/libs/System.Native.Browser/native/main.ts b/src/native/libs/System.Native.Browser/native/main.ts
index cac449056a116a..2c015738ab92c5 100644
--- a/src/native/libs/System.Native.Browser/native/main.ts
+++ b/src/native/libs/System.Native.Browser/native/main.ts
@@ -1,24 +1,24 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
-import { } from "./cross-linked"; // ensure ambient symbols are declared
+import { _ems_ } from "../../Common/JavaScript/ems-ambient";
 
 export function SystemJS_ResolveMainPromise(exitCode: number): void {
-    if (dotnetLoaderExports.resolveRunMainPromise) {
-        dotnetLoaderExports.resolveRunMainPromise(exitCode);
+    if (_ems_.dotnetLoaderExports.resolveRunMainPromise) {
+        _ems_.dotnetLoaderExports.resolveRunMainPromise(exitCode);
     } else {
         // this is for corerun, which does not use the promise
-        exitJS(exitCode, true);
+        _ems_.exitJS(exitCode, true);
     }
 }
 
 export function SystemJS_RejectMainPromise(messagePtr: number, messageLength: number, stackTracePtr: number, stackTraceLength: number): void {
-    const message = dotnetBrowserUtilsExports.utf16ToString(messagePtr, messagePtr + messageLength * 2);
-    const stackTrace = dotnetBrowserUtilsExports.utf16ToString(stackTracePtr, stackTracePtr + stackTraceLength * 2);
+    const message = _ems_.dotnetBrowserUtilsExports.utf16ToString(messagePtr, messagePtr + messageLength * 2);
+    const stackTrace = _ems_.dotnetBrowserUtilsExports.utf16ToString(stackTracePtr, stackTracePtr + stackTraceLength * 2);
     const error = new Error(message);
     error.stack = stackTrace;
-    if (dotnetLoaderExports.rejectRunMainPromise) {
-        dotnetLoaderExports.rejectRunMainPromise(error);
+    if (_ems_.dotnetLoaderExports.rejectRunMainPromise) {
+        _ems_.dotnetLoaderExports.rejectRunMainPromise(error);
     } else {
         // this is for corerun, which does not use the promise
         throw error;
diff --git a/src/native/libs/System.Native.Browser/native/timer.ts b/src/native/libs/System.Native.Browser/native/timer.ts
index 67113bedd5f4e1..e195e928818811 100644
--- a/src/native/libs/System.Native.Browser/native/timer.ts
+++ b/src/native/libs/System.Native.Browser/native/timer.ts
@@ -1,34 +1,33 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
-import { } from "./cross-linked"; // ensure ambient symbols are declared
+import { _ems_ } from "../../Common/JavaScript/ems-ambient";
 
 export function SystemJS_ScheduleTimer(shortestDueTimeMs: number): void {
-    if (DOTNET.lastScheduledTimerId) {
-        globalThis.clearTimeout(DOTNET.lastScheduledTimerId);
-        Module.runtimeKeepalivePop();
-        DOTNET.lastScheduledTimerId = undefined;
+    if (_ems_.DOTNET.lastScheduledTimerId) {
+        globalThis.clearTimeout(_ems_.DOTNET.lastScheduledTimerId);
+        _ems_.runtimeKeepalivePop();
+        _ems_.DOTNET.lastScheduledTimerId = undefined;
     }
-    DOTNET.lastScheduledTimerId = safeSetTimeout(SystemJS_ScheduleTimerTick, shortestDueTimeMs);
+    _ems_.DOTNET.lastScheduledTimerId = _ems_.safeSetTimeout(SystemJS_ScheduleTimerTick, shortestDueTimeMs);
 
     function SystemJS_ScheduleTimerTick(): void {
-        DOTNET.lastScheduledTimerId = undefined;
-        _SystemJS_ExecuteTimerCallback();
+        _ems_.DOTNET.lastScheduledTimerId = undefined;
+        _ems_._SystemJS_ExecuteTimerCallback();
     }
 }
-SystemJS_ScheduleTimer["__deps"] = ["SystemJS_ExecuteTimerCallback"];
 
 export function SystemJS_ScheduleBackgroundJob(): void {
-    if (DOTNET.lastScheduledThreadPoolId) {
-        globalThis.clearTimeout(DOTNET.lastScheduledThreadPoolId);
-        Module.runtimeKeepalivePop();
-        DOTNET.lastScheduledThreadPoolId = undefined;
+    if (_ems_.DOTNET.lastScheduledThreadPoolId) {
+        globalThis.clearTimeout(_ems_.DOTNET.lastScheduledThreadPoolId);
+        _ems_.runtimeKeepalivePop();
+        _ems_.DOTNET.lastScheduledThreadPoolId = undefined;
     }
-    DOTNET.lastScheduledThreadPoolId = safeSetTimeout(SystemJS_ScheduleBackgroundJobTick, 0);
+    _ems_.DOTNET.lastScheduledThreadPoolId = _ems_.safeSetTimeout(SystemJS_ScheduleBackgroundJobTick, 0);
 
     function SystemJS_ScheduleBackgroundJobTick(): void {
-        DOTNET.lastScheduledThreadPoolId = undefined;
-        _SystemJS_ExecuteBackgroundJobCallback();
+        _ems_.DOTNET.lastScheduledThreadPoolId = undefined;
+        _ems_._SystemJS_ExecuteBackgroundJobCallback();
     }
 }
-SystemJS_ScheduleBackgroundJob["__deps"] = ["SystemJS_ExecuteBackgroundJobCallback"];
+
diff --git a/src/native/libs/System.Native.Browser/utils/cdac.ts b/src/native/libs/System.Native.Browser/utils/cdac.ts
index 6a080a8fece04c..52b55b4dca8d4b 100644
--- a/src/native/libs/System.Native.Browser/utils/cdac.ts
+++ b/src/native/libs/System.Native.Browser/utils/cdac.ts
@@ -2,9 +2,9 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 import type { RuntimeAPI } from "./types";
-import { Module } from "./cross-module";
+import { _ems_ } from "../../Common/JavaScript/ems-ambient";
 
 export function registerCDAC(runtimeApi: RuntimeAPI): void {
-    runtimeApi.INTERNAL.GetDotNetRuntimeContractDescriptor = () => _GetDotNetRuntimeContractDescriptor();
-    runtimeApi.INTERNAL.GetDotNetRuntimeHeap = (ptr: number, length: number) => Module.HEAPU8.subarray(ptr >>> 0, (ptr >>> 0) + length);
+    runtimeApi.INTERNAL.GetDotNetRuntimeContractDescriptor = () => _ems_._GetDotNetRuntimeContractDescriptor();
+    runtimeApi.INTERNAL.GetDotNetRuntimeHeap = (ptr: number, length: number) => _ems_.Module.HEAPU8.subarray(ptr >>> 0, (ptr >>> 0) + length);
 }
diff --git a/src/native/libs/System.Native.Browser/utils/cross-linked.ts b/src/native/libs/System.Native.Browser/utils/cross-linked.ts
deleted file mode 100644
index 7214ddd74e84af..00000000000000
--- a/src/native/libs/System.Native.Browser/utils/cross-linked.ts
+++ /dev/null
@@ -1,10 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-
-
-import { } from "../../Common/JavaScript/cross-linked";
-declare global {
-    export let ABORT: boolean;
-    export let EXITSTATUS: number;
-    export function ExitStatus(exitCode: number): number;
-}
diff --git a/src/native/libs/System.Native.Browser/utils/cross-module.ts b/src/native/libs/System.Native.Browser/utils/cross-module.ts
index 182969d8e7b5e3..8e72db213b830d 100644
--- a/src/native/libs/System.Native.Browser/utils/cross-module.ts
+++ b/src/native/libs/System.Native.Browser/utils/cross-module.ts
@@ -2,4 +2,3 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 export * from "../../Common/JavaScript/cross-module";
-
diff --git a/src/native/libs/System.Native.Browser/utils/host.ts b/src/native/libs/System.Native.Browser/utils/host.ts
index a9246e51e2ae75..a30df05a17a2a4 100644
--- a/src/native/libs/System.Native.Browser/utils/host.ts
+++ b/src/native/libs/System.Native.Browser/utils/host.ts
@@ -2,43 +2,42 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 import BuildConfiguration from "consts:configuration";
-import { Module, dotnetApi } from "./cross-module";
-
+import { _ems_ } from "../../Common/JavaScript/ems-ambient";
 // eslint-disable-next-line @typescript-eslint/no-unused-vars
 export function setEnvironmentVariable(name: string, value: string): void {
     throw new Error("Not implemented");
 }
 
 export function getExitStatus(): new (exitCode: number) => any {
-    return ExitStatus as any;
+    return _ems_.ExitStatus as any;
 }
 
 export function abortTimers(): void {
-    if (DOTNET.lastScheduledTimerId) {
-        globalThis.clearTimeout(DOTNET.lastScheduledTimerId);
-        Module.runtimeKeepalivePop();
-        DOTNET.lastScheduledTimerId = undefined;
+    if (_ems_.DOTNET.lastScheduledTimerId) {
+        globalThis.clearTimeout(_ems_.DOTNET.lastScheduledTimerId);
+        _ems_.runtimeKeepalivePop();
+        _ems_.DOTNET.lastScheduledTimerId = undefined;
     }
-    if (DOTNET.lastScheduledThreadPoolId) {
-        globalThis.clearTimeout(DOTNET.lastScheduledThreadPoolId);
-        Module.runtimeKeepalivePop();
-        DOTNET.lastScheduledThreadPoolId = undefined;
+    if (_ems_.DOTNET.lastScheduledThreadPoolId) {
+        globalThis.clearTimeout(_ems_.DOTNET.lastScheduledThreadPoolId);
+        _ems_.runtimeKeepalivePop();
+        _ems_.DOTNET.lastScheduledThreadPoolId = undefined;
     }
 }
 
 export function abortPosix(exitCode: number): void {
-    ABORT = true;
-    EXITSTATUS = exitCode;
+    _ems_.ABORT = true;
+    _ems_.EXITSTATUS = exitCode;
     try {
         if (BuildConfiguration === "Debug") {
-            _exit(exitCode, true);
+            _ems_._exit(exitCode, true);
         } else {
-            _emscripten_force_exit(exitCode);
+            _ems_._emscripten_force_exit(exitCode);
         }
     } catch (error: any) {
         // do not propagate ExitStatus exception
         if (error.status === undefined) {
-            dotnetApi.exit(1, error);
+            _ems_.dotnetApi.exit(1, error);
             throw error;
         }
     }
diff --git a/src/native/libs/System.Native.Browser/utils/index.ts b/src/native/libs/System.Native.Browser/utils/index.ts
index 95434eb7bd8ae2..ff24c8eb2c82d5 100644
--- a/src/native/libs/System.Native.Browser/utils/index.ts
+++ b/src/native/libs/System.Native.Browser/utils/index.ts
@@ -3,7 +3,6 @@
 
 import type { InternalExchange, BrowserUtilsExports, RuntimeAPI, BrowserUtilsExportsTable } from "./types";
 import { InternalExchangeIndex } from "../types";
-import { } from "./cross-module"; // ensure ambient symbols are declared
 
 import GitHash from "consts:gitHash";
 
@@ -72,4 +71,4 @@ export function dotnetInitializeModule(internals: InternalExchange): void {
 }
 
 // see also `reserved` in `rollup.config.defines.js`
-export * as cross from "./cross-module";
+export * as _ems_ambient_ from "./cross-module";
diff --git a/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/native/cross-linked.ts b/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/native/cross-linked.ts
deleted file mode 100644
index f2caa4fb684a7b..00000000000000
--- a/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/native/cross-linked.ts
+++ /dev/null
@@ -1,8 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-
-import { } from "../../Common/JavaScript/cross-linked";
-
-declare global {
-    export const DOTNET_INTEROP: any;
-}
diff --git a/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/native/index.ts b/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/native/index.ts
index 021eb895af80a0..1c455310cda05f 100644
--- a/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/native/index.ts
+++ b/src/native/libs/System.Runtime.InteropServices.JavaScript.Native/native/index.ts
@@ -3,14 +3,14 @@
 
 import type { InternalExchange, InteropJavaScriptExports, InteropJavaScriptExportsTable, JSFnHandle, JSMarshalerArguments } from "../interop/types";
 import { InternalExchangeIndex } from "../types";
-import { } from "./cross-linked"; // ensure ambient symbols are declared
+import { _ems_ } from "../../Common/JavaScript/ems-ambient";
 
 import GitHash from "consts:gitHash";
 
 // eslint-disable-next-line @typescript-eslint/no-unused-vars
 export function SystemInteropJS_InvokeJSImportST(function_handle: JSFnHandle, args: JSMarshalerArguments) {
     // WASM-TODO implementation
-    dotnetLogger.error("SystemInteropJS_InvokeJSImportST called");
+    _ems_.dotnetLogger.error("SystemInteropJS_InvokeJSImportST called");
     return - 1;
 }
 
@@ -20,8 +20,8 @@ export function dotnetInitializeModule(internals: InternalExchange): void {
     const runtimeApi = internals[InternalExchangeIndex.RuntimeAPI];
     if (typeof runtimeApi !== "object") throw new Error("Expected internals to have RuntimeAPI");
 
-    if (runtimeApi.runtimeBuildInfo.gitHash && runtimeApi.runtimeBuildInfo.gitHash !== DOTNET_INTEROP.gitHash) {
-        throw new Error(`Mismatched git hashes between loader and runtime. Loader: ${runtimeApi.runtimeBuildInfo.gitHash}, DOTNET_INTEROP: ${DOTNET_INTEROP.gitHash}`);
+    if (runtimeApi.runtimeBuildInfo.gitHash && runtimeApi.runtimeBuildInfo.gitHash !== _ems_.DOTNET_INTEROP.gitHash) {
+        throw new Error(`Mismatched git hashes between loader and runtime. Loader: ${runtimeApi.runtimeBuildInfo.gitHash}, DOTNET_INTEROP: ${_ems_.DOTNET_INTEROP.gitHash}`);
     }
 
     internals[InternalExchangeIndex.InteropJavaScriptExportsTable] = interopJavaScriptExportsToTable({
@@ -32,5 +32,5 @@ export function dotnetInitializeModule(internals: InternalExchange): void {
         return [
         ];
     }
-    dotnetUpdateInternals(internals, dotnetUpdateInternalsSubscriber);
+    _ems_.dotnetUpdateInternals(internals, _ems_.dotnetUpdateInternalsSubscriber);
 }
diff --git a/src/native/rollup.config.defines.js b/src/native/rollup.config.defines.js
index 96005063aec63b..aa0d31c92e4892 100644
--- a/src/native/rollup.config.defines.js
+++ b/src/native/rollup.config.defines.js
@@ -22,21 +22,21 @@ export const staticLibDestination = process.env.StaticLibDestination || "../../a
 
 console.log(`Rollup configuration: Configuration=${configuration}, ProductVersion=${productVersion}, ContinuousIntegrationBuild=${isContinuousIntegrationBuild}`);
 
-export const banner = "//! Licensed to the .NET Foundation under one or more agreements.\n//! The .NET Foundation licenses this file to you under the MIT license.\n//! This is generated file, see src/native/libs/Browser/rollup.config.defines.js\n\n";
+export const banner = "//! Licensed to the .NET Foundation under one or more agreements.\n//! The .NET Foundation licenses this file to you under the MIT license.\n//! This is generated file, see src/native/rollup.config.js\n\n";
 export const banner_dts = banner + "//! This is not considered public API with backward compatibility guarantees. \n";
 export const keep_classnames = /(ManagedObject|ManagedError|Span|ArraySegment)/;
 export const keep_fnames = /(dotnetUpdateInternals|dotnetUpdateInternalsSubscriber)/;
 export const reserved = [
-    "Module", "dotnetApi",
-    "dotnetInternals", "dotnetLogger", "dotnetAssert", "dotnetJSEngine",
-    "dotnetUpdateInternals", "dotnetUpdateInternalsSubscriber", "dotnetInitializeModule",
+    "_ems_", "Module",
+    "dotnetInternals", "dotnetUpdateInternals", "dotnetUpdateInternalsSubscriber", "dotnetInitializeModule",
+    "dotnetLogger", "dotnetAssert", "dotnetApi",
     "dotnetLoaderExports", "dotnetRuntimeExports", "dotnetBrowserHostExports", "dotnetInteropJSExports",
     "dotnetNativeBrowserExports", "dotnetBrowserUtilsExports", "dotnetDiagnosticsExports",
 ];
 
 export const externalDependencies = ["module", "process", "perf_hooks", "node:crypto"];
 export const artifactsObjDir = "../../artifacts/obj";
-export const isDebug = process.env.Configuration !== "Release";
+export const isDebug = process.env.Configuration !== "Release" && !isContinuousIntegrationBuild;
 
 export let gitHash;
 try {
diff --git a/src/native/rollup.config.js b/src/native/rollup.config.js
index a0504349a19c18..24ec8ce9f30414 100644
--- a/src/native/rollup.config.js
+++ b/src/native/rollup.config.js
@@ -10,7 +10,7 @@ import {
     isDebug, staticLibDestination,
     keep_classnames, keep_fnames, reserved
 } from "./rollup.config.defines.js";
-import { terserPlugin, writeOnChangePlugin, consts, onwarn, alwaysLF, iife2fe, sourcemapPathTransform } from "./rollup.config.plugins.js";
+import { terserPlugin, writeOnChangePlugin, consts, onwarn, alwaysLF, iife2fe, emsAmbient, sourcemapPathTransform } from "./rollup.config.plugins.js";
 import { promises as fs } from "fs";
 
 const dotnetDTS = {
@@ -170,7 +170,7 @@ export default defineConfig([
     libBrowserHost,
 ]);
 
-function configure({ input, output, terser }) {
+function configure({ input, output, terser, external }) {
     return {
         treeshake: !isDebug,
         input,
@@ -179,14 +179,14 @@ function configure({ input, output, terser }) {
                 banner,
                 format: "es",
                 plugins: isDebug
-                    ? [iife2fe(), writeOnChangePlugin()]
-                    : [terserPlugin(terser), iife2fe(), writeOnChangePlugin()],
+                    ? [emsAmbient(), iife2fe(), writeOnChangePlugin()]
+                    : [emsAmbient(), terserPlugin(terser), iife2fe(), writeOnChangePlugin()],
                 sourcemap: true, //isDebug ? true : "hidden",
                 sourcemapPathTransform,
                 ...o
             };
         }),
-        external: externalDependencies,
+        external: external ? [...external, ...externalDependencies] : externalDependencies,
         plugins: [
             nodeResolve(),
             consts(envConstants),
diff --git a/src/native/rollup.config.plugins.js b/src/native/rollup.config.plugins.js
index ea9da5b39e292c..7eac65e1df23a8 100644
--- a/src/native/rollup.config.plugins.js
+++ b/src/native/rollup.config.plugins.js
@@ -48,15 +48,31 @@ export function iife2fe() {
             //throw new Error("iife2fe " + code);
             asset.code = code
                 .replace(/}\({}\);/, "};") // }({}); ->};
-                .replace(/}\)\({}\);/, "});") // })({}); ->});
-            ;
+                .replace(/}\)\({}\);/, "});"); // })({}); ->});
         }
     };
 }
 
+// Drop _ems_ symbol from emscripten libraries
+export function emsAmbient() {
+    return {
+        name: "emsAmbient",
+        generateBundle: (options, bundle) => {
+            const name = Object.keys(bundle)[0];
+            if (name.endsWith(".map")) return;
+            const asset = bundle[name];
+            const code = asset.code;
+            //throw new Error("iife2fe " + code);
+            asset.code = code
+                .replace(/_ems_\./g, "");
+        }
+    };
+}
+
+
 // force always unix line ending
 export const alwaysLF = () => ({
-    name: "writeOnChange",
+    name: "alwaysLF",
     generateBundle: (options, bundle) => {
         const name = Object.keys(bundle)[0];
         const asset = bundle[name];
@@ -103,18 +119,6 @@ function checkFileExists(file) {
 }
 
 export function onwarn(warning) {
-    if (warning.code === "CIRCULAR_DEPENDENCY") {
-        return;
-    }
-
-    if (warning.code === "UNRESOLVED_IMPORT" && warning.exporter === "process") {
-        return;
-    }
-
-    if (warning.code === "PLUGIN_WARNING" && warning.message.indexOf("sourcemap") !== -1) {
-        return;
-    }
-
     // eslint-disable-next-line no-console
     console.warn(`(!) ${warning.toString()} ${warning.code}`);
 }
diff --git a/src/native/tsconfig.json b/src/native/tsconfig.json
index 9ef2a54d8676bf..16c11eb6e5e496 100644
--- a/src/native/tsconfig.json
+++ b/src/native/tsconfig.json
@@ -5,7 +5,7 @@
         "removeComments": false,
         "module": "esnext",
         "sourceMap": true,
-        // keep in sync with src/native/rollup.config.defines.js
+        // keep in sync with src/native/rollup.config.js
         "target": "ES2020",
         "moduleResolution": "Node",
         "strict": true,