diff --git a/content/install-user-css.js b/content/install-user-css.js
index a8516782..eeb050a5 100644
--- a/content/install-user-css.js
+++ b/content/install-user-css.js
@@ -1,4 +1,4 @@
-/* global semverCompare escapeHtml */
+/* global semverCompare */
 
 'use strict';
 
diff --git a/edit/lint.js b/edit/lint.js
index e56cd123..2b19f8c1 100644
--- a/edit/lint.js
+++ b/edit/lint.js
@@ -1,7 +1,6 @@
 /* global CodeMirror messageBox */
 /* global editors makeSectionVisible showCodeMirrorPopup showHelp */
 /* global onDOMscripted injectCSS require CSSLint stylelint */
-/* global escapeHtml */
 'use strict';
 
 loadLinterAssets();
diff --git a/js/dom.js b/js/dom.js
index 3cfa47a3..249de722 100644
--- a/js/dom.js
+++ b/js/dom.js
@@ -272,14 +272,3 @@ function $element(opt) {
   }
   return element;
 }
-
-
-function escapeHtml(html, {limit} = {}) {
-  const chars = {'&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;', '/': '&#x2F;'};
-  let ellipsis = '';
-  if (limit && html.length > limit) {
-    html = html.substr(0, limit);
-    ellipsis = '...';
-  }
-  return html.replace(/[&<>"'/]/g, char => chars[char]) + ellipsis;
-}