diff --git a/org.eclipse.jdt.debug.ui/plugin.properties b/org.eclipse.jdt.debug.ui/plugin.properties
index 4e7fca4bc4..6a32ed29af 100644
--- a/org.eclipse.jdt.debug.ui/plugin.properties
+++ b/org.eclipse.jdt.debug.ui/plugin.properties
@@ -1,5 +1,5 @@
 ###############################################################################
-# Copyright (c) 2000, 2025 IBM Corporation and others.
+# Copyright (c) 2000, 2026 IBM Corporation and others.
 #
 # This program and the accompanying materials
 # are made available under the terms of the Eclipse Public License 2.0
@@ -267,6 +267,9 @@ javaLikeExtensions.description=Regular expression matching registered Java-like
 Context.javaDebugging.name= Debugging Java
 Context.javaDebugging.description= Debugging Java programs
 
+Context.javaConsoleScope.name= In Java Stack Trace Console
+Context.javaConsoleScope.description= Editing Java stack traces
+
 newWizardCategoryName=Java Run/Debug
 NewJavaScrapbookPage.label= Scrapbook Page
 NewJavaScrapbookPage.description=Create a Java scrapbook page file
@@ -353,4 +356,7 @@ ToggleHitpointAction.label=Toggle Breakpoint with Hit Count
 ToggleHitpointCommand.description=Creates or removes a breakpoint with hit count
 
 CompareVariableClipboard.label=Compare With Clipboard
-CompareVariableClipboard.tooltip=Compare Variable's Value with Clipboard Content
\ No newline at end of file
+CompareVariableClipboard.tooltip=Compare Variable's Value with Clipboard Content
+
+CompareExpressionClipboard.label=Compare With Clipboard
+CompareExpressionClipboard.tooltip=Compare Expressions's Value with Clipboard Content
\ No newline at end of file
diff --git a/org.eclipse.jdt.debug.ui/plugin.xml b/org.eclipse.jdt.debug.ui/plugin.xml
index 4643154b7b..e00dc4cde6 100644
--- a/org.eclipse.jdt.debug.ui/plugin.xml
+++ b/org.eclipse.jdt.debug.ui/plugin.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?eclipse version="3.0"?>
 <!--
-     Copyright (c) 2005, 2025 IBM Corporation and others.
+     Copyright (c) 2005, 2026 IBM Corporation and others.
 
      This program and the accompanying materials
      are made available under the terms of the Eclipse Public License 2.0
@@ -1588,6 +1588,19 @@
             </and>
          </visibility>
       </objectContribution>
+      <objectContribution
+            objectClass="org.eclipse.debug.core.model.IExpression"
+            id="org.eclipse.debug.WatchExpressionActions.Compare">
+         <action
+               label="%CompareExpressionClipboard.label"
+               helpContextId="compare_expressions_clipboard_id"
+               class="org.eclipse.jdt.internal.debug.ui.actions.CompareObjectWithClipboard"
+               tooltip="%CompareExpressionClipboard.tooltip"
+               menubarPath="additions"
+               enablesFor="1"
+               id="org.eclipse.debug.ui.watchExpressionActions.CompareWithClipboard">
+         </action>
+      </objectContribution>
       <objectContribution
             id="org.eclipse.jdt.debug.ui.FilteredJavaVariableActions"
             objectClass="org.eclipse.jdt.debug.core.IJavaVariable">
@@ -3382,6 +3395,20 @@ M4 = Platform-specific fourth key
             id="org.eclipse.jdt.debug.ui.debugging"
             parentId="org.eclipse.debug.ui.debugging">
       </context>
+      <context
+            name="%Context.javaConsoleScope.name"
+            description="%Context.javaConsoleScope.description"
+            id="org.eclipse.jdt.debug.ui.javaConsoleScope"
+            parentId="org.eclipse.ui.contexts.window">
+      </context>
+   </extension>
+   <extension
+         point="org.eclipse.ui.bindings">
+      <key
+            sequence="M1+M2+F"
+            contextId="org.eclipse.jdt.debug.ui.javaConsoleScope"
+            commandId="org.eclipse.jdt.ui.edit.text.java.format"
+            schemeId="org.eclipse.ui.defaultAcceleratorConfiguration"/>
    </extension>
    <extension
          point="org.eclipse.debug.ui.debugModelContextBindings">
diff --git a/org.eclipse.jdt.debug.ui/ui/org/eclipse/jdt/internal/debug/ui/actions/CompareObjectWithClipboard.java b/org.eclipse.jdt.debug.ui/ui/org/eclipse/jdt/internal/debug/ui/actions/CompareObjectWithClipboard.java
index 6bbe7a528e..c84223f2d7 100644
--- a/org.eclipse.jdt.debug.ui/ui/org/eclipse/jdt/internal/debug/ui/actions/CompareObjectWithClipboard.java
+++ b/org.eclipse.jdt.debug.ui/ui/org/eclipse/jdt/internal/debug/ui/actions/CompareObjectWithClipboard.java
@@ -26,6 +26,9 @@
 import org.eclipse.compare.structuremergeviewer.DiffNode;
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.debug.core.DebugException;
+import org.eclipse.debug.core.model.IDebugTarget;
+import org.eclipse.debug.core.model.IExpression;
+import org.eclipse.debug.core.model.IValue;
 import org.eclipse.debug.core.model.IVariable;
 import org.eclipse.debug.internal.ui.DebugUIPlugin;
 import org.eclipse.debug.ui.DebugUITools;
@@ -37,8 +40,10 @@
 import org.eclipse.jdt.internal.debug.core.model.JDINullValue;
 import org.eclipse.jdt.internal.debug.core.model.JDIPrimitiveValue;
 import org.eclipse.jdt.internal.debug.core.model.JDIStackFrame;
+import org.eclipse.jdt.internal.debug.ui.display.JavaInspectExpression;
 import org.eclipse.jface.action.IAction;
 import org.eclipse.jface.dialogs.MessageDialog;
+import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.swt.dnd.Clipboard;
 import org.eclipse.swt.dnd.TextTransfer;
@@ -53,34 +58,33 @@ public void run(IAction action) {
 		if (selection == null) {
 			return;
 		}
+
+		Object clpbrd = getClipboard();
+		if (clpbrd == null) {
+			MessageDialog.openWarning(DebugUIPlugin.getShell(), "Comparison Failed", "Invalid clipboard content"); //$NON-NLS-1$ //$NON-NLS-2$
+			return;
+		}
+
 		if (selection.getFirstElement() instanceof IJavaVariable variable) {
 			try {
-				Object clpbrd = getClipboard();
-				if (clpbrd != null) {
-					String cb = clpbrd.toString();
-					String variableName = variable.getName();
-					if (variable.getValue() instanceof IJavaObject javaObject && !(javaObject instanceof JDINullValue)) {
-						if (javaObject.getJavaType() instanceof IJavaArrayType) {
-							StringBuilder arrBuilder = new StringBuilder("["); //$NON-NLS-1$
-							for (IVariable variableTemp : variable.getValue().getVariables()) {
-								arrBuilder.append(variableTemp.getValue() + ", "); //$NON-NLS-1$
-							}
-							arrBuilder.delete(arrBuilder.length() - 2, arrBuilder.length());
-							arrBuilder.append("]"); //$NON-NLS-1$
-							compareVariable(arrBuilder.toString(), variableName, cb);
-							return;
-						}
-						JDIStackFrame frame = (JDIStackFrame) DebugUITools.getDebugContext();
-						IJavaThread thread = (IJavaThread) frame.getThread();
-						IJavaValue stringVal = javaObject.sendMessage("toString", "()Ljava/lang/String;", null, thread, false); //$NON-NLS-1$//$NON-NLS-2$
-						String variableValue = stringVal.getValueString();
-						compareVariable(variableValue, variableName, cb);
-					}
-					if (variable.getValue() instanceof JDIPrimitiveValue javaPrimitive) {
-						compareVariable(javaPrimitive.toString(), variableName, cb);
-					}
-				} else {
-					MessageDialog.openWarning(DebugUIPlugin.getShell(), "Variable Value Comparision", "Invalid clipboard content"); //$NON-NLS-1$ //$NON-NLS-2$
+				handleCompareForValue(variable.getName(), clpbrd.toString(), variable.getValue());
+				return;
+			} catch (DebugException e) {
+				DebugUIPlugin.log(e);
+			}
+		}
+
+		if (selection.getFirstElement() instanceof IExpression expression) {
+			try {
+				String cb = clpbrd.toString();
+				String title = "Selected Expression"; //$NON-NLS-1$
+				if (expression instanceof JavaInspectExpression) {
+					handleCompareForValue(title, cb, expression.getValue());
+					return;
+				}
+				IValue expValue = expression.getValue();
+				if (expValue != null) {
+					compareVariable(expValue.getValueString(), title, cb);
 				}
 			} catch (DebugException e) {
 				DebugUIPlugin.log(e);
@@ -88,6 +92,62 @@ public void run(IAction action) {
 		}
 	}
 
+	/**
+	 * Resolves the string representation of <code>value</code> and opens the compare editor.
+	 *
+	 * @param title
+	 *            label for the left side of the compare editor
+	 * @param clipboard
+	 *            active clipboard content to compare against
+	 * @param value
+	 *            value of the selected variable or expression
+	 * @throws DebugException
+	 *             if evaluating the value or retrieving array elements fails
+	 */
+	private void handleCompareForValue(String title, String clipboard, IValue value) throws DebugException {
+
+		if (value instanceof IJavaObject javaObject && !(javaObject instanceof JDINullValue)) {
+			if (javaObject.getJavaType() instanceof IJavaArrayType) {
+				handleCompareForArrayTypes(title, clipboard, value.getVariables());
+				return;
+			}
+			if (!(DebugUITools.getDebugContext() instanceof JDIStackFrame frame)) {
+				return;
+			}
+			IJavaThread thread = (IJavaThread) frame.getThread();
+			IJavaValue stringVal = javaObject.sendMessage("toString", "()Ljava/lang/String;", null, thread, false); //$NON-NLS-1$//$NON-NLS-2$
+			compareVariable(stringVal.getValueString(), title, clipboard);
+		} else if (value instanceof JDIPrimitiveValue javaPrimitive) {
+			compareVariable(javaPrimitive.getValueString(), title, clipboard);
+		}
+	}
+
+	/**
+	 * Builds a string representation of the given array variables and opens the compare editor.
+	 *
+	 * @param title
+	 *            Label shown on the left side of the compare editor (variable name or expression text)
+	 * @param clipboard
+	 *            Active clipboard content to compare against
+	 * @param variables
+	 *            The array elements as <code>IVariable[]</code>, obtained from the array value
+	 * @throws DebugException
+	 *             if retrieving a variable's value fails
+	 */
+	private void handleCompareForArrayTypes(String title, String clipboard, IVariable[] variables) throws DebugException {
+		if (variables.length == 0) {
+			compareVariable("[]", title, clipboard); //$NON-NLS-1$
+			return;
+		}
+		StringBuilder arrBuilder = new StringBuilder("["); //$NON-NLS-1$
+		for (IVariable variableTemp : variables) {
+			arrBuilder.append(variableTemp.getValue() + ", "); //$NON-NLS-1$
+		}
+		arrBuilder.delete(arrBuilder.length() - 2, arrBuilder.length());
+		arrBuilder.append("]"); //$NON-NLS-1$
+		compareVariable(arrBuilder.toString(), title, clipboard);
+	}
+
 	/**
 	 * Creates comparable objects
 	 *
@@ -136,7 +196,7 @@ public InputStream getContents() {
 		config.setLeftLabel(variableName);
 		config.setRightLabel("Contents in clipboard"); //$NON-NLS-1$
 		config.setLeftEditable(false);
-		config.setLeftEditable(false);
+		config.setRightEditable(false);
 		CompareEditorInput compareInput = new CompareEditorInput(config) {
 			@Override
 			protected Object prepareInput(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
@@ -163,4 +223,24 @@ private Object getClipboard() {
 		}
 	}
 
+	@Override
+	public void selectionChanged(IAction action, ISelection selection) {
+		if (selection instanceof IStructuredSelection ss) {
+			if (ss.getFirstElement() instanceof IExpression expression) {
+				if (expression.getValue() == null) {
+					action.setEnabled(false);
+					return;
+				}
+				IDebugTarget target = expression.getDebugTarget();
+				if (target == null) {
+					action.setEnabled(false);
+					return;
+				}
+				if (target.isTerminated() || target.isDisconnected()) {
+					action.setEnabled(false);
+				}
+			}
+		}
+	}
+
 }
diff --git a/org.eclipse.jdt.debug.ui/ui/org/eclipse/jdt/internal/debug/ui/console/JavaStackTracePageParticipant.java b/org.eclipse.jdt.debug.ui/ui/org/eclipse/jdt/internal/debug/ui/console/JavaStackTracePageParticipant.java
index a46005dbbb..3d3edcde65 100644
--- a/org.eclipse.jdt.debug.ui/ui/org/eclipse/jdt/internal/debug/ui/console/JavaStackTracePageParticipant.java
+++ b/org.eclipse.jdt.debug.ui/ui/org/eclipse/jdt/internal/debug/ui/console/JavaStackTracePageParticipant.java
@@ -35,6 +35,14 @@
  */
 public class JavaStackTracePageParticipant implements IConsolePageParticipant {
 
+	/**
+	 * Dedicated context activated while a Java stack trace console page is showing, used only to enable the Format command's key binding (see
+	 * jdt.debug.ui's plugin.xml). This is intentionally <b>not</b> the shared "org.eclipse.jdt.ui.javaEditorScope"/"org.eclipse.ui.textEditorScope"
+	 * context: activating those would also make unrelated generic text/java editor key bindings (e.g. the zoom in/out commands) take priority over
+	 * this console's own key bindings while it is showing.
+	 */
+    private static final String JAVA_CONSOLE_SCOPE = "org.eclipse.jdt.debug.ui.javaConsoleScope"; //$NON-NLS-1$
+
     private CloseConsoleAction fCloseAction;
     private FormatStackTraceActionDelegate fFormatAction;
     private IHandlerActivation fHandlerActivation;
@@ -88,8 +96,13 @@ public Object execute(ExecutionEvent event) throws ExecutionException {
 
         fHandlerActivation = handlerService.activateHandler("org.eclipse.jdt.ui.edit.text.java.format", formatHandler); //$NON-NLS-1$
 
+        // Activate our own dedicated context (rather than the shared java/text
+        // editor scope) so that the Format command's Ctrl+Shift+F key binding
+        // works here, without dragging in unrelated generic editor key bindings
+        // (e.g. zoom in/out) that would otherwise take priority over this
+        // console's own key bindings while it is showing.
         IContextService contextService = workbench.getAdapter(IContextService.class);
-        fContextActivation = contextService.activateContext("org.eclipse.jdt.ui.javaEditorScope"); //$NON-NLS-1$
+        fContextActivation = contextService.activateContext(JAVA_CONSOLE_SCOPE);
 	}
 
 	/* (non-Javadoc)
diff --git a/org.eclipse.jdt.debug/META-INF/MANIFEST.MF b/org.eclipse.jdt.debug/META-INF/MANIFEST.MF
index c7bc713a22..5ef560aea2 100644
--- a/org.eclipse.jdt.debug/META-INF/MANIFEST.MF
+++ b/org.eclipse.jdt.debug/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %pluginName
 Bundle-SymbolicName: org.eclipse.jdt.debug; singleton:=true
-Bundle-Version: 3.26.0.qualifier
+Bundle-Version: 3.26.100.qualifier
 Bundle-ClassPath: jdimodel.jar
 Bundle-Activator: org.eclipse.jdt.internal.debug.core.JDIDebugPlugin
 Bundle-Vendor: %providerName
diff --git a/org.eclipse.jdt.debug/model/org/eclipse/jdt/internal/debug/core/model/JDIThread.java b/org.eclipse.jdt.debug/model/org/eclipse/jdt/internal/debug/core/model/JDIThread.java
index d607ff7141..7c1c59621b 100644
--- a/org.eclipse.jdt.debug/model/org/eclipse/jdt/internal/debug/core/model/JDIThread.java
+++ b/org.eclipse.jdt.debug/model/org/eclipse/jdt/internal/debug/core/model/JDIThread.java
@@ -113,6 +113,12 @@ public class JDIThread extends JDIDebugElement implements IJavaThread {
 	 */
 	private static final String MAIN_THREAD_GROUP = "main"; //$NON-NLS-1$
 
+	/**
+	 * Constant for the name of the {@code RMI Runtime} thread group. See internal JDK method {@code sun.rmi.runtime.RuntimeUtil.newUserThread()},
+	 * which uses: {@code sun.rmi.runtime.RuntimeUtil.userThreadGroup}
+	 */
+	private static final String RMI_RUNTIME_THREAD_GROUP = "RMI Runtime"; //$NON-NLS-1$
+
 	/**
 	 * @since 3.5
 	 */
@@ -565,7 +571,7 @@ protected void determineIfSystemThread() throws DebugException {
 				// #targetRequestFailed will throw an exception
 				return;
 			}
-			if (tgn != null && tgn.equals(MAIN_THREAD_GROUP)) {
+			if (MAIN_THREAD_GROUP.equals(tgn) || RMI_RUNTIME_THREAD_GROUP.equals(tgn)) {
 				fIsSystemThread = false;
 				break;
 			}