--- a/toolkit/components/narrate/VoiceSelect.jsm
+++ b/toolkit/components/narrate/VoiceSelect.jsm
@@ -17,22 +17,22 @@ function VoiceSelect(win, label) {
       <span class="label">${label}</span> <span class="current-voice"></span>
     </button>
     <div class="options" id="voice-options" role="listbox"></div>`;
 
   this._elementRef = Cu.getWeakReference(element);
 
   let button = this.selectToggle;
   button.addEventListener("click", this);
-  button.addEventListener("keypress", this);
+  button.addEventListener("keydown", this);
 
   let listbox = this.listbox;
   listbox.addEventListener("click", this);
   listbox.addEventListener("mousemove", this);
-  listbox.addEventListener("keypress", this);
+  listbox.addEventListener("keydown", this);
   listbox.addEventListener("wheel", this, true);
 
   win.addEventListener("resize", () => {
     this._updateDropdownHeight();
   });
 }
 
 VoiceSelect.prototype = {
@@ -98,26 +98,26 @@ VoiceSelect.prototype = {
           this.toggleList();
         }
         break;
 
       case "mousemove":
         this.listbox.classList.add("hovering");
         break;
 
-      case "keypress":
+      case "keydown":
         if (target.classList.contains("select-toggle")) {
           if (evt.altKey) {
             this.toggleList(true);
           } else {
-            this._keyPressedButton(evt);
+            this._keyDownedButton(evt);
           }
         } else {
           this.listbox.classList.remove("hovering");
-          this._keyPressedInBox(evt);
+          this._keyDownedInBox(evt);
         }
         break;
 
       case "wheel":
         // Don't let wheel events bubble to document. It will scroll the page
         // and close the entire narrate dialog.
         evt.stopPropagation();
         break;
@@ -142,17 +142,17 @@ VoiceSelect.prototype = {
       }
 
       next = sibling;
     }
 
     return next;
   },
 
-  _keyPressedButton(evt) {
+  _keyDownedButton(evt) {
     if (evt.altKey && (evt.key === "ArrowUp" || evt.key === "ArrowUp")) {
       this.toggleList(true);
       return;
     }
 
     let toSelect;
     switch (evt.key) {
       case "PageUp":
@@ -172,17 +172,17 @@ VoiceSelect.prototype = {
     }
 
     if (toSelect && toSelect.classList.contains("option")) {
       evt.preventDefault();
       this.selected = toSelect;
     }
   },
 
-  _keyPressedInBox(evt) {
+  _keyDownedInBox(evt) {
     let toFocus;
     let cur = this._doc.activeElement;
 
     switch (evt.key) {
       case "ArrowUp":
         toFocus = cur.previousElementSibling || this.listbox.lastElementChild;
         break;
       case "ArrowDown":

--- a/toolkit/components/narrate/test/browser_voiceselect.js
+++ b/toolkit/components/narrate/test/browser_voiceselect.js
@@ -82,31 +82,31 @@ add_task(async function testVoiceselectK
 
     let firstValue = $(NarrateTestUtils.VOICE_SELECTED).dataset.value;
 
     ok(!NarrateTestUtils.isVisible($(NarrateTestUtils.VOICE_OPTIONS)),
       "voice options initially are hidden");
 
     $(NarrateTestUtils.VOICE_SELECT).focus();
 
-    eventUtils.sendKey("DOWN", content);
+    eventUtils.synthesizeKey("KEY_ArrowDown", {}, content);
 
     await ContentTaskUtils.waitForCondition(
       () => $(NarrateTestUtils.VOICE_SELECTED).dataset.value != firstValue,
-      "value changed after pressing DOWN key");
+      "value changed after pressing ArrowDown key");
 
-    eventUtils.sendKey("RETURN", content);
+    eventUtils.synthesizeKey("KEY_Enter", {}, content);
 
     ok(NarrateTestUtils.isVisible($(NarrateTestUtils.VOICE_OPTIONS)),
-      "voice options showing after pressing RETURN");
+      "voice options showing after pressing Enter");
 
-    eventUtils.sendKey("UP", content);
+    eventUtils.synthesizeKey("KEY_ArrowUp", {}, content);
 
-    eventUtils.sendKey("RETURN", content);
+    eventUtils.synthesizeKey("KEY_Enter", {}, content);
 
     ok(!NarrateTestUtils.isVisible($(NarrateTestUtils.VOICE_OPTIONS)),
-      "voice options hidden after pressing RETURN");
+      "voice options hidden after pressing Enter");
 
     await ContentTaskUtils.waitForCondition(
       () => $(NarrateTestUtils.VOICE_SELECTED).dataset.value == firstValue,
-      "value changed back to original after pressing RETURN");
+      "value changed back to original after pressing Enter");
   });
 });