diff --git a/accessible/mac/AccessibleWrap.mm b/accessible/mac/AccessibleWrap.mm
index 9ea6ac2094a7..336f20f768eb 100644
--- a/accessible/mac/AccessibleWrap.mm
+++ b/accessible/mac/AccessibleWrap.mm
@@ -166,8 +166,7 @@ nsresult AccessibleWrap::HandleAccEvent(AccEvent* aEvent) {
         // If the selection is collapsed, invalidate our text selection cache.
         MOXTextMarkerDelegate* delegate =
             [MOXTextMarkerDelegate getOrCreateForDoc:aEvent->Document()];
-        int32_t caretOffset = event->GetCaretOffset();
-        [delegate setSelectionFrom:eventTarget at:caretOffset to:eventTarget at:caretOffset];
+        [delegate invalidateSelection];
       }
 
       [nativeAcc handleAccessibleEvent:eventType];
diff --git a/accessible/mac/Platform.mm b/accessible/mac/Platform.mm
index f8b634885185..32c28cd47492 100644
--- a/accessible/mac/Platform.mm
+++ b/accessible/mac/Platform.mm
@@ -100,7 +100,7 @@ void ProxyCaretMoveEvent(ProxyAccessible* aTarget, int32_t aOffset, bool aIsSele
   if (aIsSelectionCollapsed) {
     // If selection is collapsed, invalidate selection.
     MOXTextMarkerDelegate* delegate = [MOXTextMarkerDelegate getOrCreateForDoc:aTarget->Document()];
-    [delegate setSelectionFrom:aTarget at:aOffset to:aTarget at:aOffset];
+    [delegate invalidateSelection];
   }
 
   if (wrapper) {
diff --git a/accessible/mac/mozAccessible.mm b/accessible/mac/mozAccessible.mm
index 74d060b089b4..570f3537db4a 100644
--- a/accessible/mac/mozAccessible.mm
+++ b/accessible/mac/mozAccessible.mm
@@ -840,21 +840,10 @@ enum AXTextStateChangeType {
     case nsIAccessibleEvent::EVENT_SELECTION_WITHIN:
       [self moxPostNotification:NSAccessibilitySelectedChildrenChangedNotification];
       break;
-    case nsIAccessibleEvent::EVENT_TEXT_CARET_MOVED: {
-      // We consider any caret move event to be a selected text change event.
-      // So dispatching an event for EVENT_TEXT_SELECTION_CHANGED would be reduntant.
-      id<MOXTextMarkerSupport> delegate =  [self moxTextMarkerDelegate];
-      id selectedRange = [delegate moxSelectedTextMarkerRange];
-      NSDictionary* userInfo = @{
-        @"AXTextChangeElement": self,
-        @"AXSelectedTextMarkerRange": (selectedRange ? selectedRange : [NSNull null])
-      };
-
-      mozAccessible* webArea = GetNativeFromGeckoAccessible([self geckoDocument]);
-      [webArea moxPostNotification:NSAccessibilitySelectedTextChangedNotification withUserInfo:userInfo];
-      [self moxPostNotification:NSAccessibilitySelectedTextChangedNotification withUserInfo:userInfo];
+    case nsIAccessibleEvent::EVENT_TEXT_CARET_MOVED:
+    case nsIAccessibleEvent::EVENT_TEXT_SELECTION_CHANGED:
+      [self moxPostNotification:NSAccessibilitySelectedTextChangedNotification];
       break;
-    }
   }
 }
 
diff --git a/accessible/tests/browser/mac/browser_text_input.js b/accessible/tests/browser/mac/browser_text_input.js
index 32f5b5f22a92..0dfeedf2da62 100644
--- a/accessible/tests/browser/mac/browser_text_input.js
+++ b/accessible/tests/browser/mac/browser_text_input.js
@@ -64,54 +64,7 @@ function testValueChangedEventData(
   is(str, expectedWordAtLeft);
 }
 
-function eventDuoPromise(eventName, expectedId) {
-  return [
-    waitForMacEventWithInfo(eventName, (iface, data) => {
-      return (
-        iface.getAttributeValue("AXRole") == "AXWebArea" &&
-        !!data &&
-        data.AXTextChangeElement.getAttributeValue("AXDOMIdentifier") ==
-          expectedId
-      );
-    }),
-    waitForMacEventWithInfo(
-      eventName,
-      (iface, data) =>
-        iface.getAttributeValue("AXDOMIdentifier") == expectedId && !!data
-    ),
-  ];
-}
-
-async function synthKeyAndTestSelectionChanged(
-  synthKey,
-  synthEvent,
-  expectedId,
-  expectedSelectionString
-) {
-  let valueChangedEvents = Promise.all(
-    eventDuoPromise("AXSelectedTextChanged", expectedId)
-  );
-
-  EventUtils.synthesizeKey(synthKey, synthEvent);
-  let [, inputEvent] = await valueChangedEvents;
-  is(
-    inputEvent.data.AXTextChangeElement.getAttributeValue("AXDOMIdentifier"),
-    expectedId,
-    "Correct AXTextChangeElement"
-  );
-
-  let rangeString = inputEvent.macIface.getParameterizedAttributeValue(
-    "AXStringForTextMarkerRange",
-    inputEvent.data.AXSelectedTextMarkerRange
-  );
-  is(
-    rangeString,
-    expectedSelectionString,
-    `selection has correct value (${expectedSelectionString})`
-  );
-}
-
-async function synthKeyAndTestValueChanged(
+async function synthKeyAndTestEvent(
   synthKey,
   synthEvent,
   expectedId,
@@ -119,14 +72,23 @@ async function synthKeyAndTestValueChanged(
   expectedEditType,
   expectedWordAtLeft
 ) {
-  let valueChangedEvents = Promise.all(
-    eventDuoPromise("AXSelectedTextChanged", expectedId).concat(
-      eventDuoPromise("AXValueChanged", expectedId)
-    )
-  );
+  let valueChangedEvents = Promise.all([
+    waitForMacEventWithInfo("AXValueChanged", (iface, data) => {
+      return (
+        iface.getAttributeValue("AXRole") == "AXWebArea" &&
+        !!data &&
+        data.AXTextChangeElement.getAttributeValue("AXDOMIdentifier") == "input"
+      );
+    }),
+    waitForMacEventWithInfo(
+      "AXValueChanged",
+      (iface, data) =>
+        iface.getAttributeValue("AXDOMIdentifier") == "input" && !!data
+    ),
+  ]);
 
   EventUtils.synthesizeKey(synthKey, synthEvent);
-  let [, , webareaEvent, inputEvent] = await valueChangedEvents;
+  let [webareaEvent, inputEvent] = await valueChangedEvents;
 
   testValueChangedEventData(
     webareaEvent.macIface,
@@ -165,7 +127,7 @@ addAccessibleTask(
       expectedChangeValue,
       expectedWordAtLeft
     ) {
-      await synthKeyAndTestValueChanged(
+      await synthKeyAndTestEvent(
         synthKey,
         null,
         "input",
@@ -191,7 +153,7 @@ addAccessibleTask(
     await testTextInput("d", "d", "world");
 
     async function testTextDelete(expectedChangeValue, expectedWordAtLeft) {
-      await synthKeyAndTestValueChanged(
+      await synthKeyAndTestEvent(
         "KEY_Backspace",
         null,
         "input",
@@ -203,33 +165,5 @@ addAccessibleTask(
 
     await testTextDelete("d", "worl");
     await testTextDelete("l", "wor");
-
-    await synthKeyAndTestSelectionChanged("KEY_ArrowLeft", null, "input", "");
-    await synthKeyAndTestSelectionChanged(
-      "KEY_ArrowLeft",
-      { shiftKey: true },
-      "input",
-      "o"
-    );
-    await synthKeyAndTestSelectionChanged(
-      "KEY_ArrowLeft",
-      { shiftKey: true },
-      "input",
-      "wo"
-    );
-    await synthKeyAndTestSelectionChanged("KEY_ArrowLeft", null, "input", "");
-    await synthKeyAndTestSelectionChanged(
-      "KEY_Home",
-      { shiftKey: true },
-      "input",
-      "hello "
-    );
-    await synthKeyAndTestSelectionChanged("KEY_ArrowLeft", null, "input", "");
-    await synthKeyAndTestSelectionChanged(
-      "KEY_ArrowRight",
-      { shiftKey: true, altKey: true },
-      "input",
-      "hello"
-    );
   }
 );