For non-editable content, selection editor commands are disabled

Source/core/page/EventHandler.cpp

Index: Source/core/page/EventHandler.cpp
diff --git a/Source/core/page/EventHandler.cpp b/Source/core/page/EventHandler.cpp
index 1ee2587626a0969843a1281f3661bd1b8d46963e..2569a6a1969e3039e070a39abf5ce7dee7ced7e4 100644
--- a/Source/core/page/EventHandler.cpp
+++ b/Source/core/page/EventHandler.cpp
@@ -774,16 +774,18 @@ bool EventHandler::handleMouseReleaseEvent(const MouseEventWithHitTestResults& e
 
     // Clear the selection if the mouse didn't move after the last mouse
     // press and it's not a context menu click.  We do this so when clicking
-    // on the selection, the selection goes away.  However, if we are
-    // editing, place the caret.
+    // on the selection, the selection goes away. For readonly texts
+    // we do need to know the position of the caret for any selection
+    // using keyboard shortcuts as its currently working in non-webkit
+    // based browsers for ex: firefox. Therefore, place the caret even
+    // for non-editable texts.
     if (m_mouseDownWasSingleClickInSelection && m_selectionInitiationState != ExtendedSelection
             && m_dragStartPos == event.event().position()
             && m_frame->selection().isRange()
             && event.event().button() != RightButton) {
         VisibleSelection newSelection;
         Node* node = event.targetNode();
-        bool caretBrowsing = m_frame->settings() && m_frame->settings()->caretBrowsingEnabled();
-        if (node && node->renderer() && (caretBrowsing || node->hasEditableStyle())) {
+        if (node && node->renderer()) {
             VisiblePosition pos = VisiblePosition(node->renderer()->positionForPoint(event.localPoint()));
             newSelection = VisibleSelection(pos);
         }