diff --git a/.mvn/extensions.xml b/.mvn/extensions.xml
index 1f36364094f1..a64ab6f242ca 100644
--- a/.mvn/extensions.xml
+++ b/.mvn/extensions.xml
@@ -1,4 +1,4 @@
-<extensions xmlns="http://maven.apache.org/EXTENSIONS/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/EXTENSIONS/1.0.0 http://maven.apache.org/xsd/core-extensions-1.0.0.xsd">
+<extensions xmlns="http://maven.apache.org/EXTENSIONS/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/EXTENSIONS/1.0.0 https://maven.apache.org/xsd/core-extensions-1.0.0.xsd">
   <extension>
     <groupId>io.jenkins.tools.incrementals</groupId>
     <artifactId>git-changelist-maven-extension</artifactId>
diff --git a/core/src/main/java/hudson/WebAppMain.java b/core/src/main/java/hudson/WebAppMain.java
index 99603ac1e411..9f328328c710 100644
--- a/core/src/main/java/hudson/WebAppMain.java
+++ b/core/src/main/java/hudson/WebAppMain.java
@@ -48,6 +48,7 @@
 import java.io.File;
 import java.io.IOException;
 import java.io.OutputStream;
+import java.lang.reflect.InvocationTargetException;
 import java.net.URL;
 import java.net.URLClassLoader;
 import java.nio.charset.Charset;
@@ -261,13 +262,36 @@ public void run() {
                         new HudsonFailedToLoad(e).publish(context, _home);
                         throw e;
                     } catch (Exception e) {
-                        new HudsonFailedToLoad(e).publish(context, _home);
+                        // Allow plugins to override error page on boot with custom BootFailure subclass thrown
+                        Throwable error = unwrapException(e);
+                        if (error instanceof InvocationTargetException) {
+                            Throwable targetException = ((InvocationTargetException) error).getTargetException();
+
+                            if (targetException instanceof BootFailure) {
+                                ((BootFailure) targetException).publish(context, _home);
+                            } else {
+                                new HudsonFailedToLoad(e).publish(context, _home);
+                            }
+                        } else {
+                            new HudsonFailedToLoad(e).publish(context, _home);
+                        }
                     } finally {
                         Jenkins instance = Jenkins.getInstanceOrNull();
                         if (!success && instance != null)
                             instance.cleanUp();
                     }
                 }
+
+                private Throwable unwrapException(Exception e) {
+                    Throwable error = e;
+                    while (error.getCause() != null) {
+                        if (error.getCause() instanceof InvocationTargetException) {
+                            return error.getCause();
+                        }
+                        error = error.getCause();
+                    }
+                    return error;
+                }
             };
             initThread.start();
         } catch (BootFailure e) {
diff --git a/core/src/main/resources/jenkins/install/platform-plugins.json b/core/src/main/resources/jenkins/install/platform-plugins.json
index 15dd708447c7..62885083fbdd 100644
--- a/core/src/main/resources/jenkins/install/platform-plugins.json
+++ b/core/src/main/resources/jenkins/install/platform-plugins.json
@@ -94,6 +94,10 @@
       { "name": "mailer", "suggested": true }
     ]
   },
+  {
+    "category": "Appearance",
+    "plugins": [{ "name": "dark-theme", "suggested": true }]
+  },
   {
     "category": "Languages",
     "plugins": [{ "name": "locale" }, { "name": "localization-zh-cn" }]
diff --git a/test/src/test/java/hudson/slaves/JNLPLauncherTest.java b/test/src/test/java/hudson/slaves/JNLPLauncherTest.java
index 813c72364558..e71b2fbcce9c 100644
--- a/test/src/test/java/hudson/slaves/JNLPLauncherTest.java
+++ b/test/src/test/java/hudson/slaves/JNLPLauncherTest.java
@@ -157,12 +157,21 @@ private ArgumentListBuilder buildJnlpArgs(Computer c) throws Exception {
         ArgumentListBuilder args = new ArgumentListBuilder();
         args.add(new File(new File(System.getProperty("java.home")), "bin/java").getPath(), "-jar");
         args.add(Which.jarFile(Launcher.class).getAbsolutePath());
-        // TODO deprecated mode
-        args.add("-jnlpUrl", j.getURL() + "computer/" + c.getName() + "/jenkins-agent.jnlp");
+        args.add("-url");
+        args.add(j.getURL());
+        args.add("-name");
+        args.add(c.getName());
 
         if (c instanceof SlaveComputer) {
             SlaveComputer sc = (SlaveComputer) c;
+            args.add("-secret");
+            args.add(sc.getJnlpMac());
             ComputerLauncher launcher = sc.getLauncher();
+            if (launcher instanceof ComputerLauncherFilter) {
+                launcher = ((ComputerLauncherFilter) launcher).getCore();
+            } else if (launcher instanceof DelegatingComputerLauncher) {
+                launcher = ((DelegatingComputerLauncher) launcher).getLauncher();
+            }
             if (launcher instanceof JNLPLauncher) {
                 args.add(((JNLPLauncher) launcher).getWorkDirSettings().toCommandLineArgs(sc));
             }
diff --git a/test/src/test/java/hudson/tasks/MavenTest.java b/test/src/test/java/hudson/tasks/MavenTest.java
index bd366adce71d..58aefa2292fb 100644
--- a/test/src/test/java/hudson/tasks/MavenTest.java
+++ b/test/src/test/java/hudson/tasks/MavenTest.java
@@ -66,6 +66,7 @@
 import org.jvnet.hudson.test.Issue;
 import org.jvnet.hudson.test.JenkinsRule;
 import org.jvnet.hudson.test.ToolInstallations;
+import org.jvnet.hudson.test.recipes.WithTimeout;
 import org.kohsuke.stapler.jelly.JellyFacet;
 
 /**
@@ -190,7 +191,7 @@ private void verify() throws Exception {
         assertNotNull(isp.installers.get(MavenInstaller.class));
     }
 
-    @Test public void sensitiveParameters() throws Exception {
+    @Test @WithTimeout(300) public void sensitiveParameters() throws Exception {
         FreeStyleProject project = j.createFreeStyleProject();
         ParametersDefinitionProperty pdb = new ParametersDefinitionProperty(
                 new StringParameterDefinition("string", "defaultValue", "string description"),