[browser] firefox testing

eng/pipelines/common/templates/wasm-library-aot-tests.yml

@@ -1,7 +1,7 @@
 parameters:
   alwaysRun: false
   extraBuildArgs: ''
-  extraHelixArgs: ''
+  extraHelixArguments: ''
   isExtraPlatformsBuild: false
   isWasmOnlyBuild: false
   buildAOTOnHelix: true
@@ -26,7 +26,7 @@ jobs:
       isExtraPlatformsBuild: ${{ parameters.isExtraPlatformsBuild }}
       isWasmOnlyBuild: ${{ parameters.isWasmOnlyBuild }}
       extraBuildArgs: /p:EnableAggressiveTrimming=true /p:BuildAOTTestsOnHelix=${{ parameters.buildAOTOnHelix }} /p:RunAOTCompilation=${{ parameters.runAOT }} ${{ parameters.extraBuildArgs }}
-      extraHelixArgs: /p:NeedsToBuildWasmAppsOnHelix=true ${{ parameters.extraHelixArgs }}
+      extraHelixArguments: /p:NeedsToBuildWasmAppsOnHelix=true ${{ parameters.extraHelixArguments }}
       alwaysRun: ${{ parameters.alwaysRun }}
       shouldRunSmokeOnly: ${{ parameters.shouldRunSmokeOnly }}
       shouldContinueOnError: ${{ parameters.shouldContinueOnError }}
@@ -35,5 +35,6 @@ jobs:
           - WasmTestOnV8
         - ${{ if eq(platform, 'browser_wasm_win') }}:
           - WasmTestOnChrome
+          - WasmTestOnFirefox
         - ${{ if or(eq(platform, 'wasi_wasm_win'), eq(platform, 'wasi_wasm')) }}:
           - WasmTestOnWasmtime

eng/pipelines/common/templates/wasm-library-tests.yml

@@ -1,7 +1,7 @@
 parameters:
   alwaysRun: false
   extraBuildArgs: ''
-  extraHelixArgs: ''
+  extraHelixArguments: ''
   isExtraPlatformsBuild: false
   isWasmOnlyBuild: false
   nameSuffix: ''
@@ -97,5 +97,5 @@ jobs:
           parameters:
             creator: dotnet-bot
             testRunNamePrefixSuffix: Mono_$(_BuildConfig)
-            extraHelixArguments: /p:BrowserHost=$(_hostedOs) $(_wasmRunSmokeTestsOnlyArg) ${{ parameters.extraHelixArgs }}
+            extraHelixArguments: /p:BrowserHost=$(_hostedOs) $(_wasmRunSmokeTestsOnlyArg) ${{ parameters.extraHelixArguments }}
             scenarios: ${{ parameters.scenarios }}

eng/pipelines/extra-platforms/runtime-extra-platforms-wasm.yml

@@ -199,6 +199,7 @@ jobs:
       scenarios:
         - WasmTestOnV8
         - WasmTestOnChrome
+        - WasmTestOnFirefox
         - WasmTestOnNodeJS
 
   # Hybrid Globalization AOT tests
@@ -321,4 +322,4 @@ jobs:
       isExtraPlatformsBuild: ${{ parameters.isExtraPlatformsBuild }}
       isWasmOnlyBuild: ${{ parameters.isWasmOnlyBuild }}
       scenarios:
-        - WasmTestOnV8
+        - WasmTestOnWasmtime

eng/pipelines/runtime.yml

@@ -843,6 +843,7 @@ extends:
           scenarios:
             - WasmTestOnV8
             - WasmTestOnChrome
+            - WasmTestOnFirefox
 
       - template: /eng/pipelines/common/templates/wasm-library-tests.yml
         parameters:
@@ -861,10 +862,12 @@ extends:
             #- browser_wasm_win
           nameSuffix: _Threading
           extraBuildArgs: /p:WasmEnableThreads=true /p:AotHostArchitecture=x64 /p:AotHostOS=$(_hostedOS)
+          extraHelixArguments: /p:WasmEnableThreads=true
           alwaysRun: ${{ variables.isRollingBuild }}
           shouldRunSmokeOnly: onLibrariesAndIllinkChanges
           scenarios:
             - WasmTestOnChrome
+            - WasmTestOnFirefox
             #- WasmTestOnNodeJS - this is not supported yet, https://github.com/dotnet/runtime/issues/85592
 
       # EAT Library tests - only run on linux

eng/testing/BrowserVersions.props

@@ -8,7 +8,9 @@
     <win_ChromeRevision>1250580</win_ChromeRevision>
     <win_ChromeBaseSnapshotUrl>https://storage.googleapis.com/chromium-browser-snapshots/Win_x64/1250586</win_ChromeBaseSnapshotUrl>
     <win_V8Version>12.3.219</win_V8Version>
-    <linux_FirefoxRevision>124.0.2</linux_FirefoxRevision>
+    <linux_FirefoxRevision>125.0.1</linux_FirefoxRevision>
     <linux_GeckoDriverRevision>0.34.0</linux_GeckoDriverRevision>
+    <win_FirefoxRevision>125.0.1</win_FirefoxRevision>
+    <win_GeckoDriverRevision>0.34.0</win_GeckoDriverRevision>
   </PropertyGroup>
 </Project>

eng/testing/WasmRunnerTemplate.cmd

@@ -30,7 +30,11 @@ if [%XHARNESS_COMMAND%] == [] (
     if /I [%SCENARIO%]==[WasmTestOnChrome] (
         set XHARNESS_COMMAND=test-browser
     ) else (
-        set XHARNESS_COMMAND=test
+        if /I [%SCENARIO%]==[WasmTestOnFirefox] (
+            set XHARNESS_COMMAND=test-browser
+        ) else (
+            set XHARNESS_COMMAND=test
+        )
     )
 )
 
@@ -56,11 +60,25 @@ if /I [%XHARNESS_COMMAND%] == [test] (
         )
     )
 ) else (
-    if [%BROWSER_PATH%] == [] if not [%HELIX_CORRELATION_PAYLOAD%] == [] (
-        set "BROWSER_PATH=--browser-path^=%HELIX_CORRELATION_PAYLOAD%\chrome-win\chrome.exe"
-    )
-    if [%JS_ENGINE_ARGS%] == [] (
-        set "JS_ENGINE_ARGS=--browser-arg^=--js-flags^=--stack-trace-limit^=1000"
+    if /I [%SCENARIO%] == [WasmTestOnChrome] (
+        if [%BROWSER_PATH%] == [] if not [%HELIX_CORRELATION_PAYLOAD%] == [] (
+            set "BROWSER_PATH=--browser-path^=%HELIX_CORRELATION_PAYLOAD%\chrome-win\chrome.exe"
+        )
+        if [%JS_ENGINE_ARGS%] == [] (
+            set "JS_ENGINE_ARGS=--browser-arg^=--js-flags^=--stack-trace-limit^=1000"
+        )
+    ) else (
+        if /I [%SCENARIO%] == [WasmTestOnFirefox] (
+            if [%BROWSER_PATH%] == [] if not [%HELIX_CORRELATION_PAYLOAD%] == [] (
+                set "BROWSER_PATH=--browser-path^=%HELIX_CORRELATION_PAYLOAD%\firefox\firefox.exe"
+            )
+            if [%JS_ENGINE%] == [] (
+                set "JS_ENGINE=--browser^=Firefox"
+            )
+            if [%JS_ENGINE_ARGS%] == [] (
+                set "JS_ENGINE_ARGS=--browser-arg^=-private-window"
+            )
+        )
     )
 )
 

eng/testing/WasmRunnerTemplate.sh

@@ -26,7 +26,9 @@ else
 fi
 
 if [[ -z "$XHARNESS_COMMAND" ]]; then
-	if [[ "$SCENARIO" == "WasmTestOnChrome" || "$SCENARIO" == "wasmtestonchrome" ]]; then
+	if [[ "$SCENARIO" == "WasmTestOnFirefox" || "$SCENARIO" == "wasmtestonfirefox" ]]; then
+		XHARNESS_COMMAND="test-browser"
+	elif [[ "$SCENARIO" == "WasmTestOnChrome" || "$SCENARIO" == "wasmtestonchrome" ]]; then
 		XHARNESS_COMMAND="test-browser"
 	else
 		XHARNESS_COMMAND="test"
@@ -59,8 +61,17 @@ if [[ "$XHARNESS_COMMAND" == "test" ]]; then
 		fi
 	fi
 else
-	if [[ -z "$JS_ENGINE_ARGS" ]]; then
-		JS_ENGINE_ARGS="--browser-arg=--js-flags=--stack-trace-limit=1000"
+	if [[ "$SCENARIO" == "WasmTestOnChrome" || "$SCENARIO" == "wasmtestonchrome" ]]; then
+		if [[ -z "$JS_ENGINE_ARGS" ]]; then
+			JS_ENGINE_ARGS="--browser-arg=--js-flags=--stack-trace-limit=1000"
+		fi
+	elif [[ "$SCENARIO" == "WasmTestOnFirefox" || "$SCENARIO" == "wasmtestonfirefox" ]]; then
+		if [[ -z "$JS_ENGINE" ]]; then
+			JS_ENGINE="--browser=Firefox"
+		fi
+		if [[ -z "$JS_ENGINE_ARGS" ]]; then
+			JS_ENGINE_ARGS="--browser-arg=-private-window"
+		fi
 	fi
 fi
 

eng/testing/tests.browser.targets

@@ -250,9 +250,18 @@
       <_NodeNpmModuleStringTrimmed Include="@(_NodeNpmModuleString->Trim(':'))" />
     </ItemGroup>
     <PropertyGroup>
+      <Scenario Condition="'$(Scenario)' == ''">WasmTestOnV8</Scenario>
       <NodeNpmModuleString>@(_NodeNpmModuleStringTrimmed, ',')</NodeNpmModuleString>
     </PropertyGroup>
 
+    <Error Condition="'$(Scenario)' != 'WasmTestOnV8' and 
+                      '$(Scenario)' != 'WasmTestOnChrome' and 
+                      '$(Scenario)' != 'WasmTestOnFirefox' and 
+                      '$(Scenario)' != 'WasmTestOnNodeJS' and 
+                      '$(Scenario)' != 'WasmDebuggerTests' and 
+                      '$(Scenario)' != 'BuildWasmApps'" 
+                      Text="Only supported scenarios are WasmTestOnV8, WasmTestOnNodeJS, WasmTestOnChrome, WasmTestOnFirefox, WasmDebuggerTests and BuildWasmApps at the moment. It was $(Scenario)." />
+
     <!-- Restore NPM packages -->
     <ItemGroup Condition="'$(OS)' != 'Windows_NT'">
       <SetScriptCommands Include="if [[ &quot;$SCENARIO&quot; == &quot;WasmTestOnNodeJS&quot; || &quot;$SCENARIO&quot; == &quot;wasmtestonnodejs&quot; ]]; then export WasmXHarnessMonoArgs=&quot;$WasmXHarnessMonoArgs --setenv=NPM_MODULES=$(NodeNpmModuleString)&quot;; fi" />

eng/testing/tests.wasi.targets

@@ -147,6 +147,13 @@
   </Target>
 
   <Target Name="_WasiAddToRunScript" BeforeTargets="GenerateRunScript">
+    <PropertyGroup>
+      <Scenario Condition="'$(Scenario)' == ''">WasmTestOnWasmtime</Scenario>
+    </PropertyGroup>
+    <Error Condition="'$(Scenario)' != 'WasmTestOnWasmtime' and 
+                      '$(Scenario)' != 'BuildWasmApps'"
+                      Text="Only supported scenarios are WasmTestOnWasmtime and BuildWasmApps at the moment. It was $(Scenario)." />
+
     <ItemGroup Condition="'$(OS)' != 'Windows_NT'">
       <SetScriptCommands Condition="'$(InstallWasmtimeForTests)' == 'true' and Exists($(WasmtimeDir))" Include="export PREPEND_PATH=$(WasmtimeDir)" />
       <SetScriptCommands Condition="'$(IsWasiProject)' == 'true'" Include="export RuntimeIdentifier=wasi-wasm" />

eng/testing/wasm-provisioning.targets

@@ -21,18 +21,30 @@
 
   <Import Project="$(MSBuildThisFileDirectory)BrowserVersions.props" />
 
-  <PropertyGroup Condition="'$(BrowserHost)' != 'windows'">
-    <FirefoxUrl>https://ftp.mozilla.org/pub/firefox/releases/$(linux_FirefoxRevision)/linux-x86_64/en-US/firefox-$(linux_FirefoxRevision).tar.bz2</FirefoxUrl>
-    <GeckoDriverUrl>https://github.com/mozilla/geckodriver/releases/download/v$(linux_GeckoDriverRevision)/geckodriver-v$(linux_GeckoDriverRevision)-linux64.tar.gz</GeckoDriverUrl>
-    <FirefoxBinaryName>firefox</FirefoxBinaryName>
-    <GeckoDriverBinaryName>geckodriver</GeckoDriverBinaryName>
+  <PropertyGroup>
     <FirefoxDir>$(ArtifactsBinDir)firefox\</FirefoxDir>
     <FirefoxDirName>firefox</FirefoxDirName>
     <GeckoDriverDirName>geckodriver</GeckoDriverDirName>
     <GeckoDriverDir>$(ArtifactsBinDir)geckodriver\</GeckoDriverDir>
+  </PropertyGroup>
+  <PropertyGroup Condition="$([MSBuild]::IsOSPlatform('linux'))">
+    <FirefoxUrl>https://ftp.mozilla.org/pub/firefox/releases/$(linux_FirefoxRevision)/linux-x86_64/en-US/firefox-$(linux_FirefoxRevision).tar.bz2</FirefoxUrl>
+    <GeckoDriverUrl>https://github.com/mozilla/geckodriver/releases/download/v$(linux_GeckoDriverRevision)/geckodriver-v$(linux_GeckoDriverRevision)-linux64.tar.gz</GeckoDriverUrl>
+    <FirefoxBinaryName>firefox</FirefoxBinaryName>
+    <GeckoDriverBinaryName>geckodriver</GeckoDriverBinaryName>
     <FirefoxStampFile>$([MSBuild]::NormalizePath($(FirefoxDir), '.install-firefox-$(linux_FirefoxRevision).stamp'))</FirefoxStampFile>
     <GeckoDriverStampFile>$([MSBuild]::NormalizePath($(GeckoDriverDir), '.install-geckodriver-$(linux_GeckoDriverRevision).stamp'))</GeckoDriverStampFile>
+    <FirefoxBinaryPath>$([MSBuild]::NormalizePath($(FirefoxDir), $(FirefoxDirName), $(FirefoxBinaryName)))</FirefoxBinaryPath>
+    <GeckoDriverBinaryPath>$([MSBuild]::NormalizePath($(GeckoDriverDir), $(GeckoDriverDirName), $(GeckoDriverBinaryName)))</GeckoDriverBinaryPath>
+  </PropertyGroup>
 
+  <PropertyGroup Condition="$([MSBuild]::IsOSPlatform('windows'))">
+    <FirefoxUrl>https://ftp.mozilla.org/pub/firefox/releases/$(win_FirefoxRevision)/win64/en-US/Firefox%20Setup%20$(win_FirefoxRevision).exe</FirefoxUrl>
+    <GeckoDriverUrl>https://github.com/mozilla/geckodriver/releases/download/v$(win_GeckoDriverRevision)/geckodriver-v$(win_GeckoDriverRevision)-win64.zip</GeckoDriverUrl>
+    <FirefoxBinaryName>firefox.exe</FirefoxBinaryName>
+    <GeckoDriverBinaryName>geckodriver.exe</GeckoDriverBinaryName>
+    <FirefoxStampFile>$([MSBuild]::NormalizePath($(FirefoxDir), '.install-firefox-$(win_FirefoxRevision).stamp'))</FirefoxStampFile>
+    <GeckoDriverStampFile>$([MSBuild]::NormalizePath($(GeckoDriverDir), '.install-geckodriver-$(win_GeckoDriverRevision).stamp'))</GeckoDriverStampFile>
     <FirefoxBinaryPath>$([MSBuild]::NormalizePath($(FirefoxDir), $(FirefoxDirName), $(FirefoxBinaryName)))</FirefoxBinaryPath>
     <GeckoDriverBinaryPath>$([MSBuild]::NormalizePath($(GeckoDriverDir), $(GeckoDriverDirName), $(GeckoDriverBinaryName)))</GeckoDriverBinaryPath>
   </PropertyGroup>
@@ -183,7 +195,7 @@ export __SCRIPT_DIR=%24( cd -- "%24( dirname -- "%24{BASH_SOURCE[0]}" )" &amp;>
 
   <Target Name="DownloadAndInstallFirefox"
           AfterTargets="$(WasmProvisionAfterTarget)"
-          Condition="!Exists($(FirefoxStampFile)) and '$(InstallFirefoxForTests)' == 'true' and !$([MSBuild]::IsOSPlatform('windows'))">
+          Condition="!Exists($(FirefoxStampFile)) and '$(InstallFirefoxForTests)' == 'true'">
     <ItemGroup>
       <_StampFile Include="$(_BrowserStampDir).install-firefox*.stamp" />
     </ItemGroup>
@@ -197,24 +209,22 @@ export __SCRIPT_DIR=%24( cd -- "%24( dirname -- "%24{BASH_SOURCE[0]}" )" &amp;>
     <DownloadFile SourceUrl="$(FirefoxUrl)" DestinationFolder="$(FirefoxDir)" SkipUnchangedFiles="true">
       <Output TaskParameter="DownloadedFile" PropertyName="_DownloadedFile" />
     </DownloadFile>
-    <Exec Command="tar -xf $(_DownloadedFile) -C $(FirefoxDir)"/>
-    <Exec Command="rm -rf $(_DownloadedFile)"/>
-
-    <PropertyGroup>
-      <_FirefoxBinaryPath>$([MSBuild]::NormalizePath($(FirefoxDir), $(FirefoxBinaryName)))</_FirefoxBinaryPath>
-    </PropertyGroup>
+    <MakeDir Directories="$(FirefoxDir)\$(FirefoxDirName)"/>
+    <Exec Command="tar -xf $(_DownloadedFile) -C $(FirefoxDir)" Condition="$([MSBuild]::IsOSPlatform('linux'))" />
+    <Exec Command="&quot;$(_DownloadedFile)&quot; /InstallDirectoryPath=$(FirefoxDir)$(FirefoxDirName) /TaskbarShortcut=false /DesktopShortcut=false /StartMenuShortcut=false /PrivateBrowsingShortcut=false /MaintenanceService=false /PreventRebootRequired=true" Condition="$([MSBuild]::IsOSPlatform('windows'))" />
+    <Delete Files="$(_DownloadedFile)" />
 
-    <Error Text="Cannot find firefox at $(_FirefoxBinaryPath) in the downloaded copy"
-           Condition="!Exists($(_FirefoxBinaryPath))" />
+    <Error Text="Cannot find firefox at $(FirefoxBinaryPath) in the downloaded copy"
+           Condition="!Exists($(FirefoxBinaryPath))" />
 
-    <Exec Command="chmod +x $(_FirefoxBinaryPath)"/>
+    <Exec Command="chmod +x $(FirefoxBinaryPath)" Condition="$([MSBuild]::IsOSPlatform('linux'))"/>
 
     <Touch Files="$(FirefoxStampFile)" AlwaysCreate="true" />
   </Target>
 
   <Target Name="DownloadAndInstallGeckoDriver"
           AfterTargets="$(WasmProvisionAfterTarget)"
-          Condition="!Exists($(GeckoDriverStampFile)) and '$(InstallFirefoxForTests)' == 'true' and !$([MSBuild]::IsOSPlatform('windows'))">
+          Condition="!Exists($(GeckoDriverStampFile)) and '$(InstallFirefoxForTests)' == 'true'">
     <ItemGroup>
       <_StampFile Include="$(_BrowserStampDir).install-geckodriver*.stamp" />
     </ItemGroup>
@@ -228,18 +238,15 @@ export __SCRIPT_DIR=%24( cd -- "%24( dirname -- "%24{BASH_SOURCE[0]}" )" &amp;>
     <DownloadFile SourceUrl="$(GeckoDriverUrl)" DestinationFolder="$(GeckoDriverDir)" SkipUnchangedFiles="true">
       <Output TaskParameter="DownloadedFile" PropertyName="_DownloadedFile" />
     </DownloadFile>
-    <Exec Command="mkdir -p $(GeckoDriverDir)/$(GeckoDriverDirName)"/>
-    <Exec Command="tar -xf $(_DownloadedFile) -C $(GeckoDriverDir)/$(GeckoDriverDirName)"/>
-    <Exec Command="rm -rf $(_DownloadedFile)"/>
-
-    <PropertyGroup>
-      <_GeckoDriverBinaryPath>$([MSBuild]::NormalizePath($(GeckoDriverDir), $(GeckoDriverBinaryName)))</_GeckoDriverBinaryPath>
-    </PropertyGroup>
+    <MakeDir Directories="$(GeckoDriverDir)/$(GeckoDriverDirName)"/>
+    <Exec Command="tar -xf $(_DownloadedFile) -C $(GeckoDriverDir)/$(GeckoDriverDirName)" Condition="$([MSBuild]::IsOSPlatform('linux'))" />
+    <Unzip SourceFiles="$(_DownloadedFile)" DestinationFolder="$(GeckoDriverDir)/$(GeckoDriverDirName)" Condition="$([MSBuild]::IsOSPlatform('windows'))" />
+    <Delete Files="$(_DownloadedFile)" />
 
-    <Error Text="Cannot find GeckoDriver at $(_GeckoDriverBinaryPath) in the downloaded copy"
-           Condition="!Exists($(_GeckoDriverBinaryPath))" />
+    <Error Text="Cannot find GeckoDriver at $(GeckoDriverBinaryPath) in the downloaded copy"
+           Condition="!Exists($(GeckoDriverBinaryPath))" />
 
-    <Exec Command="chmod +x $(_GeckoDriverBinaryPath)"/>
+    <Exec Command="chmod +x $(GeckoDriverBinaryPath)" Condition="$([MSBuild]::IsOSPlatform('linux'))" />
 
     <Touch Files="$(GeckoDriverStampFile)" AlwaysCreate="true" />
   </Target>

src/libraries/Common/tests/System/Net/Configuration.Http.cs

@@ -58,12 +58,19 @@ public static partial class Http
             public static readonly Uri RemoteEchoServer = new Uri("http://" + Host + "/" + EchoHandler);
             public static readonly Uri SecureRemoteEchoServer = new Uri("https://" + SecureHost + "/" + EchoHandler);
             public static readonly Uri Http2RemoteEchoServer = new Uri("https://" + Http2Host + "/" + EchoHandler);
-            public static readonly Uri[] EchoServerList = new Uri[] { RemoteEchoServer, SecureRemoteEchoServer, Http2RemoteEchoServer };
+            public static Uri[] GetEchoServerList()
+            {
+                if (PlatformDetection.IsFirefox)
+                {
+                    // https://github.com/dotnet/runtime/issues/101115
+                    return [RemoteEchoServer];
+                }
+                return [RemoteEchoServer, SecureRemoteEchoServer, Http2RemoteEchoServer];
+            }
 
             public static readonly Uri RemoteVerifyUploadServer = new Uri("http://" + Host + "/" + VerifyUploadHandler);
             public static readonly Uri SecureRemoteVerifyUploadServer = new Uri("https://" + SecureHost + "/" + VerifyUploadHandler);
             public static readonly Uri Http2RemoteVerifyUploadServer = new Uri("https://" + Http2Host + "/" + VerifyUploadHandler);
-            public static readonly Uri[] VerifyUploadServerList = new Uri[] { RemoteVerifyUploadServer, SecureRemoteVerifyUploadServer, Http2RemoteVerifyUploadServer };
 
             public static readonly Uri RemoteEmptyContentServer = new Uri("http://" + Host + "/" + EmptyContentHandler);
             public static readonly Uri RemoteDeflateServer = new Uri("http://" + Host + "/" + DeflateHandler);
@@ -72,7 +79,7 @@ public static partial class Http
             public static readonly Uri Http2RemoteGZipServer = new Uri("https://" + Http2Host + "/" + GZipHandler);
             public static Uri RemoteLoopServer => new Uri("ws://" + RemoteLoopHost + "/" + RemoteLoopHandler);
 
-            public static readonly object[][] EchoServers = EchoServerList.Select(x => new object[] { x }).ToArray();
+            public static readonly object[][] EchoServers = GetEchoServerList().Select(x => new object[] { x }).ToArray();
             public static readonly object[][] VerifyUploadServers = { new object[] { RemoteVerifyUploadServer }, new object[] { SecureRemoteVerifyUploadServer }, new object[] { Http2RemoteVerifyUploadServer } };
             public static readonly object[][] CompressedServers = { new object[] { RemoteDeflateServer }, new object[] { RemoteGZipServer }, new object[] { Http2RemoteDeflateServer }, new object[] { Http2RemoteGZipServer } };
 
@@ -83,9 +90,17 @@ public static partial class Http
             public static readonly RemoteServer RemoteSecureHttp11Server = new RemoteServer(new Uri("https://" + SecureHost + "/"), HttpVersion.Version11);
             public static readonly RemoteServer RemoteHttp2Server = new RemoteServer(new Uri("https://" + Http2Host + "/"), new Version(2, 0));
 
-            public static readonly IEnumerable<RemoteServer> RemoteServers = new RemoteServer[] { RemoteHttp11Server, RemoteSecureHttp11Server, RemoteHttp2Server };
+            public static IEnumerable<RemoteServer> GetRemoteServers()
+            {
+                if (PlatformDetection.IsFirefox)
+                {
+                    // https://github.com/dotnet/runtime/issues/101115
+                    return new RemoteServer[] { RemoteHttp11Server };
+                }
+                return new RemoteServer[] { RemoteHttp11Server, RemoteSecureHttp11Server, RemoteHttp2Server };
+            }
 
-            public static readonly IEnumerable<object[]> RemoteServersMemberData = RemoteServers.Select(s => new object[] { s });
+            public static readonly IEnumerable<object[]> RemoteServersMemberData = GetRemoteServers().Select(s => new object[] { s });
 
             public sealed class RemoteServer
             {