diff --git a/browser/components/translation/TranslationDocument.jsm b/browser/components/translation/TranslationDocument.jsm
index ee580907d0f8..54ab73b3a897 100644
--- a/browser/components/translation/TranslationDocument.jsm
+++ b/browser/components/translation/TranslationDocument.jsm
@@ -6,8 +6,6 @@
 
 var EXPORTED_SYMBOLS = [ "TranslationDocument" ];
 
-const TEXT_NODE = Ci.nsIDOMNode.TEXT_NODE;
-
 ChromeUtils.import("resource://services-common/async.js");
 Cu.importGlobalProperties(["DOMParser"]);
 
@@ -141,7 +139,7 @@ this.TranslationDocument.prototype = {
     let wasLastItemPlaceholder = false;
 
     for (let child of item.nodeRef.childNodes) {
-      if (child.nodeType == TEXT_NODE) {
+      if (child.nodeType == child.TEXT_NODE) {
         let x = child.nodeValue.trim();
         if (x != "") {
           item.original.push(x);
@@ -409,7 +407,7 @@ function regenerateTextFromOriginalHelper(item) {
 function parseResultNode(item, node) {
   item.translation = [];
   for (let child of node.childNodes) {
-    if (child.nodeType == TEXT_NODE) {
+    if (child.nodeType == child.TEXT_NODE) {
       item.translation.push(child.nodeValue);
     } else if (child.localName == "br") {
       item.translation.push(TranslationItem_NodePlaceholder);
@@ -558,7 +556,7 @@ function swapTextForItem(item, target) {
     // text change instead of two (while also leaving the page closer to
     // its original state).
     while (curNode &&
-           curNode.nodeType == TEXT_NODE &&
+           curNode.nodeType == curNode.TEXT_NODE &&
            curNode.nodeValue.trim() == "") {
       curNode = curNode.nextSibling;
     }
@@ -608,7 +606,7 @@ function swapTextForItem(item, target) {
         // targetItem for those nodes are handled.
 
         while (curNode &&
-               (curNode.nodeType != TEXT_NODE ||
+               (curNode.nodeType != curNode.TEXT_NODE ||
                 curNode.nodeValue.trim() == "")) {
           curNode = curNode.nextSibling;
         }
@@ -617,7 +615,7 @@ function swapTextForItem(item, target) {
         // Finally, if it's a text item, we just need to find the next
         // text node to use. Text nodes don't need to be reordered, so
         // the first one found can be used.
-        while (curNode && curNode.nodeType != TEXT_NODE) {
+        while (curNode && curNode.nodeType != curNode.TEXT_NODE) {
           curNode = curNode.nextSibling;
         }
 
@@ -654,7 +652,7 @@ function swapTextForItem(item, target) {
 function getNextSiblingSkippingEmptyTextNodes(startSibling) {
   let item = startSibling.nextSibling;
   while (item &&
-         item.nodeType == TEXT_NODE &&
+         item.nodeType == item.TEXT_NODE &&
          item.nodeValue.trim() == "") {
     item = item.nextSibling;
   }
@@ -664,7 +662,7 @@ function getNextSiblingSkippingEmptyTextNodes(startSibling) {
 function clearRemainingNonEmptyTextNodesFromElement(startSibling) {
   let item = startSibling;
   while (item) {
-    if (item.nodeType == TEXT_NODE &&
+    if (item.nodeType == item.TEXT_NODE &&
         item.nodeValue != "") {
       item.nodeValue = "";
     }
diff --git a/browser/extensions/formautofill/FormAutofillHeuristics.jsm b/browser/extensions/formautofill/FormAutofillHeuristics.jsm
index 4781da40b6fc..8ea7ba3853d7 100644
--- a/browser/extensions/formautofill/FormAutofillHeuristics.jsm
+++ b/browser/extensions/formautofill/FormAutofillHeuristics.jsm
@@ -326,7 +326,7 @@ var LabelUtils = {
         return;
       }
 
-      if (el.nodeType == Ci.nsIDOMNode.TEXT_NODE || el.childNodes.length == 0) {
+      if (el.nodeType == el.TEXT_NODE || el.childNodes.length == 0) {
         let trimmedText = el.textContent.trim();
         if (trimmedText) {
           strings.push(trimmedText);
@@ -336,7 +336,7 @@ var LabelUtils = {
 
       for (let node of el.childNodes) {
         let nodeType = node.nodeType;
-        if (nodeType != Ci.nsIDOMNode.ELEMENT_NODE && nodeType != Ci.nsIDOMNode.TEXT_NODE) {
+        if (nodeType != node.ELEMENT_NODE && nodeType != node.TEXT_NODE) {
           continue;
         }
         _extractLabelStrings(node);
diff --git a/browser/modules/ContextMenu.jsm b/browser/modules/ContextMenu.jsm
index 59f533a73c03..8211b6e7e662 100644
--- a/browser/modules/ContextMenu.jsm
+++ b/browser/modules/ContextMenu.jsm
@@ -336,7 +336,7 @@ class ContextMenu {
     let depth = 1;
     while (node && depth > 0) {
       // See if this node is text.
-      if (node.nodeType == Ci.nsIDOMNode.TEXT_NODE) {
+      if (node.nodeType == node.TEXT_NODE) {
         // Add this text to our collection.
         text += " " + node.data;
       } else if (node instanceof this.content.HTMLImageElement) {
@@ -535,7 +535,7 @@ class ContextMenu {
     // Media related cache info parent needs for saving
     let contentType = null;
     let contentDisposition = null;
-    if (aEvent.composedTarget.nodeType == Ci.nsIDOMNode.ELEMENT_NODE &&
+    if (aEvent.composedTarget.nodeType == aEvent.composedTarget.ELEMENT_NODE &&
         aEvent.composedTarget instanceof Ci.nsIImageLoadingContent &&
         aEvent.composedTarget.currentURI) {
       disableSetDesktopBg = this._disableSetDesktopBackground(aEvent.composedTarget);
@@ -711,7 +711,7 @@ class ContextMenu {
 
     context.shouldDisplay = true;
 
-    if (node.nodeType == Ci.nsIDOMNode.DOCUMENT_NODE ||
+    if (node.nodeType == node.DOCUMENT_NODE ||
         // Don't display for XUL element unless <label class="text-link">
         (node.namespaceURI == XUL_NS && !this._isXULTextLinkLabel(node))) {
       context.shouldDisplay = false;
@@ -791,7 +791,7 @@ class ContextMenu {
   _setContextForNodesNoChildren(editFlags) {
     const context = this.context;
 
-    if (context.target.nodeType == Ci.nsIDOMNode.TEXT_NODE) {
+    if (context.target.nodeType == context.target.TEXT_NODE) {
       // For text nodes, look at the parent node to determine the spellcheck attribute.
       context.canSpellCheck = context.target.parentNode &&
                               this._isSpellCheckEnabled(context.target);
@@ -800,7 +800,7 @@ class ContextMenu {
 
     // We only deal with TEXT_NODE and ELEMENT_NODE in this function, so return
     // early if we don't have one.
-    if (context.target.nodeType != Ci.nsIDOMNode.ELEMENT_NODE) {
+    if (context.target.nodeType != context.target.ELEMENT_NODE) {
       return;
     }
 
@@ -931,7 +931,7 @@ class ContextMenu {
     let elem = context.target;
 
     while (elem) {
-      if (elem.nodeType == Ci.nsIDOMNode.ELEMENT_NODE) {
+      if (elem.nodeType == elem.ELEMENT_NODE) {
         // Link?
         const XLINK_NS = "http://www.w3.org/1999/xlink";
 
@@ -997,7 +997,7 @@ class ContextMenu {
     // See if the user clicked on MathML
     const MathML_NS = "http://www.w3.org/1998/Math/MathML";
 
-    if ((context.target.nodeType == Ci.nsIDOMNode.TEXT_NODE &&
+    if ((context.target.nodeType == context.target.TEXT_NODE &&
          context.target.parentNode.namespaceURI == MathML_NS) ||
          (context.target.namespaceURI == MathML_NS)) {
       context.onMathML = true;