--- a/accessible/tests/mochitest/tree/test_aria_globals.html
+++ b/accessible/tests/mochitest/tree/test_aria_globals.html
@@ -33,17 +33,17 @@
         "live",
         "owns",
         "relevant"
       ];
 
       // Elements having ARIA global state or properties or referred by another
       // element must be accessible.
       ok(isAccessible("pawn"),
-         "Must be accessible because referred by another elemnet.");
+         "Must be accessible because referred by another element.");
 
       for (var idx = 0; idx < globalIds.length; idx++) {
         ok(isAccessible(globalIds[idx]),
            "Must be accessible becuase of " + "aria-" + globalIds[idx] +
            " presence");
       }
 
       // Unfocusable elements, having ARIA global state or property with a valid

--- a/content/html/content/src/nsHTMLInputElement.h
+++ b/content/html/content/src/nsHTMLInputElement.h
@@ -219,17 +219,17 @@ public:
   nsresult GetValidationMessage(nsAString& aValidationMessage,
                                 ValidityStateType aType);
   /**
    * Update the value missing validity state for radio elements when they have
    * a group.
    *
    * @param aIgnoreSelf Whether the required attribute and the checked state
    * of the current radio should be ignored.
-   * @note This method shouldn't be called if the radio elemnet hasn't a group.
+   * @note This method shouldn't be called if the radio element hasn't a group.
    */
   void     UpdateValueMissingValidityStateForRadio(bool aIgnoreSelf);
 
   /**
    * Set filters to the filePicker according to the accept attribute value.
    *
    * See:
    * http://dev.w3.org/html5/spec/forms.html#attr-input-accept
@@ -512,17 +512,17 @@ protected:
   nsresult SetDefaultValueAsValue();
 
   virtual void SetDirectionIfAuto(bool aAuto, bool aNotify);
 
   /**
    * Return if an element should have a specific validity UI
    * (with :-moz-ui-invalid and :-moz-ui-valid pseudo-classes).
    *
-   * @return Whether the elemnet should have a validity UI.
+   * @return Whether the element should have a validity UI.
    */
   bool ShouldShowValidityUI() const {
     /**
      * Always show the validity UI if the form has already tried to be submitted
      * but was invalid.
      *
      * Otherwise, show the validity UI if the element's value has been changed.
      */

--- a/content/html/content/src/nsHTMLTextAreaElement.cpp
+++ b/content/html/content/src/nsHTMLTextAreaElement.cpp
@@ -235,17 +235,17 @@ protected:
 
   virtual nsresult AfterSetAttr(int32_t aNamespaceID, nsIAtom *aName,
                                 const nsAttrValue* aValue, bool aNotify);
 
   /**
    * Return if an element should have a specific validity UI
    * (with :-moz-ui-invalid and :-moz-ui-valid pseudo-classes).
    *
-   * @return Whether the elemnet should have a validity UI.
+   * @return Whether the element should have a validity UI.
    */
   bool ShouldShowValidityUI() const {
     /**
      * Always show the validity UI if the form has already tried to be submitted
      * but was invalid.
      *
      * Otherwise, show the validity UI if the element's value has been changed.
      */

--- a/content/html/content/test/forms/test_input_list_attribute.html
+++ b/content/html/content/test/forms/test_input_list_attribute.html
@@ -45,28 +45,28 @@ function test3(aContent, aInput) {
   var datalist = document.createElement("datalist");
   datalist.id = 'd';
 
   aInput.setAttribute('list', 'd');
 
   return null;
 }
 
-// If one of the elemnet isn't in doc.
+// If one of the element isn't in doc.
 function test4(aContent, aInput) {
   var datalist = document.createElement("datalist");
   datalist.id = 'd';
 
   aContent.appendChild(aInput);
   aInput.setAttribute('list', 'd');
 
   return null;
 }
 
-// If one of the elemnet isn't in doc.
+// If one of the element isn't in doc.
 function test5(aContent, aInput) {
   var datalist = document.createElement("datalist");
   datalist.id = 'd';
 
   aContent.appendChild(datalist);
   aInput.setAttribute('list', 'd');
 
   return null;

--- a/layout/reftests/css-ui-invalid/button/button-invalid.html
+++ b/layout/reftests/css-ui-invalid/button/button-invalid.html
@@ -1,8 +1,8 @@
 <!DOCTYPE html>
 <html class="reftest-wait">
-  <!-- Test: button elemnet is never affected by :-moz-ui-invalid. -->
+  <!-- Test: button element is never affected by :-moz-ui-invalid. -->
   <link rel='stylesheet' type='text/css' href='style.css'>
   <body onload="document.getElementById('b').setCustomValidity('foo'); document.documentElement.className='';">
     <button class='notinvalid' id='b'></button>
   </body>
 </html>

--- a/layout/reftests/css-ui-invalid/button/button-valid.html
+++ b/layout/reftests/css-ui-invalid/button/button-valid.html
@@ -1,8 +1,8 @@
 <!DOCTYPE html>
 <html>
-  <!-- Test: button elemnet is never affected by :-moz-ui-invalid. -->
+  <!-- Test: button element is never affected by :-moz-ui-invalid. -->
   <link rel='stylesheet' type='text/css' href='style.css'>
   <body>
     <button class='notinvalid'</button>
   </body>
 </html>

--- a/layout/reftests/css-ui-valid/button/button-invalid.html
+++ b/layout/reftests/css-ui-valid/button/button-invalid.html
@@ -1,8 +1,8 @@
 <!DOCTYPE html>
 <html class="reftest-wait">
-  <!-- Test: button elemnet is never affected by :-moz-ui-valid. -->
+  <!-- Test: button element is never affected by :-moz-ui-valid. -->
   <link rel='stylesheet' type='text/css' href='style.css'>
   <body onload="document.getElementById('b').setCustomValidity('foo'); document.documentElement.className='';">
     <button class='notvalid' id='b'></button>
   </body>
 </html>