diff --git a/docs/workflow/building/coreclr/wasm.md b/docs/workflow/building/coreclr/wasm.md
index b2c6caa2d495d6..4f10f4c6a438ff 100644
--- a/docs/workflow/building/coreclr/wasm.md
+++ b/docs/workflow/building/coreclr/wasm.md
@@ -48,12 +48,12 @@ dotnet tool install --global dotnet-serve
 
 **Linux/macOS:**
 ```bash
-dotnet-serve --directory "artifacts/bin/coreclr/browser.wasm.Debug/corewasmrun"
+dotnet-serve --directory "artifacts/bin/coreclr/browser.wasm.Debug"
 ```
 
 **Windows:**
 ```cmd
-dotnet-serve --directory "artifacts\bin\coreclr\browser.wasm.Debug\corewasmrun"
+dotnet-serve --directory "artifacts\bin\coreclr\browser.wasm.Debug"
 ```
 
 This will start a local HTTP server and you can open the provided URL in your browser.
@@ -155,7 +155,7 @@ Note that for `corerun` path in the `args` and `CORE_ROOT` need to be **absolute
 
 3. **Copy managed DLLs** `System.Runtime.dll` and `helloworld.dll` into `artifacts/bin/coreclr/browser.wasm.Debug/IL/`.
 
-4. **Set breakpoints** in `corewasmrun.js` in one of the `put_char` functions (the `stdout`/`stderr` implementation)
+4. **Set breakpoints** in `corerun.js` in one of the `put_char` functions (the `stdout`/`stderr` implementation)
 
 5. **Start debugging** and step through the WebAssembly code using the call stack
 
diff --git a/src/coreclr/hosts/corerun/CMakeLists.txt b/src/coreclr/hosts/corerun/CMakeLists.txt
index 56aa91453621fe..f41afefcd30fc0 100644
--- a/src/coreclr/hosts/corerun/CMakeLists.txt
+++ b/src/coreclr/hosts/corerun/CMakeLists.txt
@@ -2,13 +2,15 @@ project(corerun)
 
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 
+set(CORERUN_IN_BROWSER 0)
+
 if(CLR_CMAKE_HOST_WIN32)
     add_definitions(-DFX_VER_INTERNALNAME_STR=corerun.exe)
-else(CLR_CMAKE_HOST_WIN32)
+else()
     include(configure.cmake)
-endif(CLR_CMAKE_HOST_WIN32)
+endif()
 
-#Required to expose symbols for global symbol discovery.
+# Required to expose symbols for global symbol discovery.
 set(CLR_CMAKE_KEEP_NATIVE_SYMBOLS TRUE)
 
 add_executable_clr(corerun
@@ -33,36 +35,39 @@ if(CLR_CMAKE_HOST_WIN32)
     if (CLR_CMAKE_HOST_ARCH_AMD64)
         target_link_options(corerun PRIVATE "/CETCOMPAT")
     endif()
-else(CLR_CMAKE_HOST_WIN32)
+else()
     target_link_libraries(corerun PRIVATE ${CMAKE_DL_LIBS})
     # Required to expose symbols for global symbol discovery
     target_link_libraries(corerun PRIVATE -rdynamic)
 
-    # Android implements pthread natively
+    # Android implements pthread natively.
+    # WASM, linking against pthreads indicates Node.js workers are
+    # enabled and not suitable for the browser.
     if(NOT CLR_CMAKE_TARGET_ANDROID AND NOT CLR_CMAKE_TARGET_ARCH_WASM)
         target_link_libraries(corerun PRIVATE pthread)
     endif()
     # Static linking
     if (CLR_CMAKE_TARGET_ARCH_WASM)
-        target_sources(corerun PRIVATE corerun.wasm.cpp)
+        target_sources(corerun PRIVATE ./wasm/pinvoke_override.cpp)
+        target_include_directories(corerun PRIVATE ./wasm/)
         target_link_libraries(corerun PRIVATE
-        coreclr_static
-        System.Native-Static
-        System.Native.TimeZoneData)
+            coreclr_static
+            System.Native-Static
+            System.Native.TimeZoneData)
         # linker options for NodeJs, link in JavaScript helper, access to local filesystem
         if (CLR_CMAKE_TARGET_BROWSER)
-            target_compile_options(corerun PRIVATE 
+            target_compile_options(corerun PRIVATE
                 -fwasm-exceptions
                 -msimd128
                 )
-            target_link_libraries(corerun PRIVATE 
+            target_link_libraries(corerun PRIVATE
                 System.Native.Browser-Static)
             set(JS_SYSTEM_NATIVE_BROWSER
                 "${CLR_ARTIFACTS_OBJ_DIR}/native/browser-${CMAKE_BUILD_TYPE}-wasm/System.Native.Browser/libSystem.Native.Browser.js")
             set(JS_SYSTEM_BROWSER_UTILS
                 "${CLR_ARTIFACTS_OBJ_DIR}/native/browser-${CMAKE_BUILD_TYPE}-wasm/System.Native.Browser/libSystem.Browser.Utils.js")
             set(JS_CORE_RUN_PRE
-                "${CMAKE_CURRENT_SOURCE_DIR}/libCorerun.pre.js")
+                "${CMAKE_CURRENT_SOURCE_DIR}/wasm/libCorerun.pre.js")
             set_target_properties(corerun PROPERTIES
                 LINK_DEPENDS "${JS_CORE_RUN_PRE};${JS_SYSTEM_NATIVE_BROWSER};${JS_SYSTEM_BROWSER_UTILS};"
                 LINK_FLAGS "--pre-js ${JS_CORE_RUN_PRE} --js-library ${JS_SYSTEM_NATIVE_BROWSER} --js-library ${JS_SYSTEM_BROWSER_UTILS}"
@@ -71,11 +76,30 @@ else(CLR_CMAKE_HOST_WIN32)
                 -fwasm-exceptions
                 -sEXIT_RUNTIME=1
                 -sINITIAL_MEMORY=134217728
-                -sENVIRONMENT=node,shell
                 -sSTACK_SIZE=5MB
-                -lnoderawfs.js
-                -lnodefs.js
+                -sENVIRONMENT=node,shell,web
                 -Wl,-error-limit=0)
+
+            if (CORERUN_IN_BROWSER)
+                # Include the virtual file system data for the
+                # browser scenario.
+                set(WASM_PRELOAD_DIR "${CMAKE_INSTALL_PREFIX}/IL")
+                if (EXISTS "${WASM_PRELOAD_DIR}")
+                    target_link_options(corerun PRIVATE
+                        --preload-file ${WASM_PRELOAD_DIR}@/)
+                endif()
+            else()
+                # If not running in the browser, add
+                # Node.js file system support.
+                target_link_options(corerun PRIVATE
+                    -lnoderawfs.js
+                    -lnodefs.js)
+            endif()
+        endif()
+
+        if (CORERUN_IN_BROWSER)
+            # Install the HTML file for running in the browser.
+            install(FILES "./wasm/corerun.html" DESTINATION . COMPONENT hosts)
         endif()
     endif()
 endif(CLR_CMAKE_HOST_WIN32)
diff --git a/src/coreclr/hosts/corerun/corerun.cpp b/src/coreclr/hosts/corerun/corerun.cpp
index 2b8105f3b3081a..538d63b8cf1db7 100644
--- a/src/coreclr/hosts/corerun/corerun.cpp
+++ b/src/coreclr/hosts/corerun/corerun.cpp
@@ -10,8 +10,8 @@
 #include "dotenv.hpp"
 
 #ifdef TARGET_WASM
-#include "corerun.wasm.hpp"
-#endif
+#include <pinvoke_override.hpp>
+#endif // TARGET_WASM
 
 #include <fstream>
 
@@ -79,6 +79,7 @@ namespace envvar
     // - PROPERTY: corerun will pass the paths vias the TRUSTED_PLATFORM_ASSEMBLIES property
     // - EXTERNAL: corerun will pass an external assembly probe to the runtime for app assemblies
     // - Not set: same as PROPERTY
+    // - The TPA list as a platform delimited list of paths. The same format as the system's PATH env var.
     const char_t* appAssemblies = W("APP_ASSEMBLIES");
 }
 
@@ -167,7 +168,7 @@ static bool try_get_export(pal::mod_t mod, const char* symbol, void** fptr)
     *fptr = pal::get_module_symbol(mod, symbol);
     if (*fptr != nullptr)
         return true;
-#else // !TARGET_WASM    
+#else // !TARGET_WASM
     if (!strcmp(symbol, "coreclr_initialize")){
         *fptr = (void*)coreclr_initialize;
         return true;
@@ -380,8 +381,7 @@ static int run(const configuration& config)
     }
     else
     {
-        pal::fprintf(stderr, W("Unknown value for APP_ASSEMBLIES environment variable: %s\n"), app_assemblies_env.c_str());
-        return -1;
+        tpa_list = std::move(app_assemblies_env);
     }
 
     {
@@ -492,8 +492,8 @@ static int run(const configuration& config)
 
 #ifdef TARGET_WASM
     // install the pinvoke override callback to resolve p/invokes to statically linked libraries
-    wasm_add_pinvoke_override();
-#endif
+    add_pinvoke_override();
+#endif // TARGET_WASM
 
     int result;
     result = coreclr_init_func(
diff --git a/src/coreclr/hosts/corewasmrun/index.html b/src/coreclr/hosts/corerun/wasm/corerun.html
similarity index 63%
rename from src/coreclr/hosts/corewasmrun/index.html
rename to src/coreclr/hosts/corerun/wasm/corerun.html
index 7fecf3afe85302..99bae741f7e14b 100644
--- a/src/coreclr/hosts/corewasmrun/index.html
+++ b/src/coreclr/hosts/corerun/wasm/corerun.html
@@ -2,17 +2,29 @@
 <html>
 <head>
     <meta charset="utf-8">
-    <title>corewasmrun</title>
+    <title>corerun-wasm</title>
 </head>
 <body>
-    <h1>corewasmrun</h1>
+    <h1>corerun-wasm</h1>
     <pre id="log"></pre>
     <script>
         Module = {
+            arguments: [
+                "HelloWorld.dll"
+            ],
             preRun: [ function () {
-                ENV.PAL_DBG_CHANNELS="+all.all";
-                // ENV.PAL_DBG_CHANNELS="+all.ERROR";
-            }],
+                // Build the TPA list and set the APP_ASSEMBLIES environment variable.
+                const path = "/";
+                let tpaList = "";
+                let files = FS.readdir(path);
+                files.forEach(function(file) {
+                    if (file.endsWith(".dll")) {
+                        tpaList += (tpaList.length > 0 ? ":" : "") + path + file;
+                    }
+                });
+
+                ENV["APP_ASSEMBLIES"] = tpaList;
+            } ],
             onExit: function (code) {
                 console.log("onExit, code: " + code);
             },
@@ -21,7 +33,7 @@ <h1>corewasmrun</h1>
         const originalConsoleLog = console.log;
         console.log = function(message) {
             originalConsoleLog(message);
-            fetch('/log=corewasmrun-log.txt', {
+            fetch('/log=corerun-wasm-log.txt', {
                 method: 'POST',
                 body: ('stdout: ' + message),
                 headers: {
@@ -35,7 +47,7 @@ <h1>corewasmrun</h1>
         const originalConsoleError = console.error;
         console.error = function(message) {
             originalConsoleError(message);
-            fetch('/log=corewasmrun-log.txt', {
+            fetch('/log=corerun-wasm-log.txt', {
                 method: 'POST',
                 body: ('stderr: ' + message),
                 headers: {
@@ -48,5 +60,5 @@ <h1>corewasmrun</h1>
             document.querySelector("#log").appendChild(elt);
         };
     </script>
-    <script src="corewasmrun.js"></script>
+    <script src="corerun.js"></script>
 </body>
diff --git a/src/coreclr/hosts/corerun/libCorerun.pre.js b/src/coreclr/hosts/corerun/wasm/libCorerun.pre.js
similarity index 72%
rename from src/coreclr/hosts/corerun/libCorerun.pre.js
rename to src/coreclr/hosts/corerun/wasm/libCorerun.pre.js
index fefba3db358fd1..b38606f0b06c19 100644
--- a/src/coreclr/hosts/corerun/libCorerun.pre.js
+++ b/src/coreclr/hosts/corerun/wasm/libCorerun.pre.js
@@ -4,12 +4,17 @@ var dotnetInternals = [
     },
     [],
 ];
-Module.preRun = () => {
+var basePreRun = () => {
     // copy all node/shell env variables to emscripten env
     if (globalThis.process && globalThis.process.env) {
         for (const [key, value] of Object.entries(process.env)) {
             ENV[key] = value;
         }
     }
+
     ENV["DOTNET_SYSTEM_GLOBALIZATION_INVARIANT"] = "true";
-};
\ No newline at end of file
+};
+
+// Append to or set the preRun array
+Module.preRun = Module.preRun || [];
+Module.preRun.push(basePreRun);
\ No newline at end of file
diff --git a/src/coreclr/hosts/corerun/corerun.wasm.cpp b/src/coreclr/hosts/corerun/wasm/pinvoke_override.cpp
similarity index 87%
rename from src/coreclr/hosts/corerun/corerun.wasm.cpp
rename to src/coreclr/hosts/corerun/wasm/pinvoke_override.cpp
index 6e383db9206a12..26cc0d7a426806 100644
--- a/src/coreclr/hosts/corerun/corerun.wasm.cpp
+++ b/src/coreclr/hosts/corerun/wasm/pinvoke_override.cpp
@@ -11,7 +11,7 @@ extern "C" const void* SystemResolveDllImport(const char* name);
 
 // pinvoke_override:
 // Check if given function belongs to one of statically linked libraries and return a pointer if found.
-const void* pinvoke_override(const char* library_name, const char* entry_point_name)
+static const void* pinvoke_override(const char* library_name, const char* entry_point_name)
 {
     // This function is only called with the library name specified for a p/invoke, not any variations.
     // It must handle exact matches to the names specified. See Interop.Libraries.cs for each platform.
@@ -23,7 +23,7 @@ const void* pinvoke_override(const char* library_name, const char* entry_point_n
     return nullptr;
 }
 
-void wasm_add_pinvoke_override()
+void add_pinvoke_override()
 {
     PInvokeOverride::SetPInvokeOverride(pinvoke_override, PInvokeOverride::Source::RuntimeConfiguration);
 }
diff --git a/src/coreclr/hosts/corerun/corerun.wasm.hpp b/src/coreclr/hosts/corerun/wasm/pinvoke_override.hpp
similarity index 51%
rename from src/coreclr/hosts/corerun/corerun.wasm.hpp
rename to src/coreclr/hosts/corerun/wasm/pinvoke_override.hpp
index 302ef58542ac83..2ce458567c51ed 100644
--- a/src/coreclr/hosts/corerun/corerun.wasm.hpp
+++ b/src/coreclr/hosts/corerun/wasm/pinvoke_override.hpp
@@ -1,9 +1,9 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
-#ifndef __CORERUN_WASM_HPP__
-#define __CORERUN_WASM_HPP__
+#ifndef __PINVOKE_OVERRIDE_HPP__
+#define __PINVOKE_OVERRIDE_HPP__
 
-void wasm_add_pinvoke_override();
+void add_pinvoke_override();
 
-#endif // __CORERUN_WASM_HPP__
+#endif // __PINVOKE_OVERRIDE_HPP__
diff --git a/src/coreclr/hosts/corewasmrun/CMakeLists.txt b/src/coreclr/hosts/corewasmrun/CMakeLists.txt
deleted file mode 100644
index a8ed9e8c996f8b..00000000000000
--- a/src/coreclr/hosts/corewasmrun/CMakeLists.txt
+++ /dev/null
@@ -1,52 +0,0 @@
-project(corewasmrun)
-
-set(CMAKE_INCLUDE_CURRENT_DIR ON)
-
-add_executable_clr(corewasmrun
-  corewasmrun.cpp
-  ../corerun/corerun.wasm.cpp
-)
-
-set(_WASM_PRELOAD_DIR "${CMAKE_INSTALL_PREFIX}/IL")
-if (EXISTS "${_WASM_PRELOAD_DIR}")
-  set(_WASM_PRELOAD_FILE --preload-file ${_WASM_PRELOAD_DIR}@/)
-endif (EXISTS "${_WASM_PRELOAD_DIR}")
-
-target_include_directories(corewasmrun PRIVATE
-  ../corerun
-)
-
-target_compile_options(corewasmrun PRIVATE 
-  -fwasm-exceptions
-  -msimd128
-  )
-
-set(JS_SYSTEM_NATIVE_BROWSER
-    "${CLR_ARTIFACTS_OBJ_DIR}/native/browser-${CMAKE_BUILD_TYPE}-wasm/System.Native.Browser/libSystem.Native.Browser.js")
-set(JS_SYSTEM_BROWSER_UTILS
-    "${CLR_ARTIFACTS_OBJ_DIR}/native/browser-${CMAKE_BUILD_TYPE}-wasm/System.Native.Browser/libSystem.Browser.Utils.js")
-set(JS_CORE_WASM_RUN_PRE
-    "${CMAKE_CURRENT_SOURCE_DIR}/libCorewasmrun.pre.js")
-set_target_properties(corewasmrun PROPERTIES
-  LINK_DEPENDS "${JS_CORE_WASM_RUN_PRE};${JS_SYSTEM_NATIVE_BROWSER};${JS_SYSTEM_BROWSER_UTILS};"
-  LINK_FLAGS "--pre-js ${JS_CORE_WASM_RUN_PRE} --js-library ${JS_SYSTEM_NATIVE_BROWSER} --js-library ${JS_SYSTEM_BROWSER_UTILS}"
-  RUNTIME_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}")
-target_link_options(corewasmrun PRIVATE
-  -fwasm-exceptions
-  -sEXIT_RUNTIME=1
-  -sINITIAL_MEMORY=134217728
-  -sSTACK_SIZE=5MB
-  -sFORCE_FILESYSTEM=1
-  ${_WASM_PRELOAD_FILE}
-  -Wl,-error-limit=0)
-target_link_libraries(corewasmrun PRIVATE
-  coreclr_static
-  System.Native.Browser-Static
-  System.Native-Static
-  System.Native.TimeZoneData)
-
-# The corerun version for wasm is being installed in its own directory
-# because it is an executable that comes with an index.html and we
-# want to avoid clashes.
-install_clr(TARGETS corewasmrun DESTINATIONS corewasmrun COMPONENT hosts)
-install(FILES index.html DESTINATION corewasmrun COMPONENT hosts)
diff --git a/src/coreclr/hosts/corewasmrun/corewasmrun.cpp b/src/coreclr/hosts/corewasmrun/corewasmrun.cpp
deleted file mode 100644
index 02ba088cfd5996..00000000000000
--- a/src/coreclr/hosts/corewasmrun/corewasmrun.cpp
+++ /dev/null
@@ -1,81 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-
-#include <cstdio>
-#include <coreclrhost.h>
-#include <vector>
-
-#include "corerun.wasm.hpp"
-
-static void log_error_info(const char* line)
-{
-    std::fprintf(stderr, "log error: %s\n", line);
-}
-
-// The current CoreCLR instance details.
-static void* CurrentClrInstance;
-static unsigned int CurrentAppDomainId;
-
-static int run()
-{
-    const char* exe_path = "/";
-    const char* app_domain_name = "corewasmrun";
-    const char* entry_assembly = "ManagedAssembly.dll";
-
-    // Set base initialization properties.
-    std::vector<const char*> propertyKeys;
-    std::vector<const char*> propertyValues;
-
-    propertyKeys.push_back("TRUSTED_PLATFORM_ASSEMBLIES");
-    propertyValues.push_back("/HelloWorld.dll:/System.Private.CoreLib.dll:/System.Runtime.dll:/System.Console.dll:/System.Threading.dll:/System.Runtime.InteropServices.dll");
-    propertyKeys.push_back("NATIVE_DLL_SEARCH_DIRECTORIES");
-    propertyValues.push_back("/:.:");
-
-    coreclr_set_error_writer(log_error_info);
-
-    wasm_add_pinvoke_override();
-
-    printf("BEGIN: call coreclr_initialize\n");
-    int retval = coreclr_initialize(exe_path, app_domain_name, (int)propertyKeys.size(), propertyKeys.data(), propertyValues.data(), &CurrentClrInstance, &CurrentAppDomainId);
-    printf("END: call coreclr_initialize\n");
-
-    if (retval < 0)
-    {
-        std::fprintf(stderr, "coreclr_initialize failed - Error: 0x%08x\n", retval);
-        return -1;
-    }
-    else
-    {
-        printf("coreclr_initialize succeeded - retval: 0x%08x\n", retval);
-    }
-
-    int exit_code;
-    printf("BEGIN: call coreclr_execute_assembly\n");
-    retval = coreclr_execute_assembly(CurrentClrInstance, CurrentAppDomainId, 0, nullptr, "HelloWorld.dll", (uint32_t*)&exit_code);
-    printf("END: call coreclr_execute_assembly\n");
-
-    if (retval < 0)
-    {
-        std::fprintf(stderr, "coreclr_execute_assembly failed - Error: 0x%08x\n", retval);
-        return -1;
-    }
-
-    int latched_exit_code = 0;
-    printf("BEGIN: call coreclr_shutdown_2\n");
-    retval = coreclr_shutdown_2(CurrentClrInstance, CurrentAppDomainId, &latched_exit_code);
-    printf("END: call coreclr_shutdown_2\n");
-    if (retval < 0)
-    {
-        std::fprintf(stderr, "coreclr_shutdown_2 failed - Error: 0x%08x\n", retval);
-        exit_code = -1;
-    }
-
-    return retval;
-}
-
-int main()
-{
-    int retval = run();
-
-    return retval;
-}
diff --git a/src/coreclr/hosts/corewasmrun/libCorewasmrun.pre.js b/src/coreclr/hosts/corewasmrun/libCorewasmrun.pre.js
deleted file mode 100644
index 50a7e3b2d47225..00000000000000
--- a/src/coreclr/hosts/corewasmrun/libCorewasmrun.pre.js
+++ /dev/null
@@ -1,9 +0,0 @@
-var dotnetInternals = [
-    {
-        Module: Module,
-    },
-    [],
-];
-Module.preRun = () => {
-    ENV["DOTNET_SYSTEM_GLOBALIZATION_INVARIANT"] = "true";
-};
\ No newline at end of file