diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 1c95a62c..0d1ca784 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -1087,6 +1087,10 @@
     "message": "To allow access open <about:config>, right-click the list, click 'New', then 'Boolean', paste <privacy.resistFingerprinting.block_mozAddonManager> and click OK, <true>, OK, reload the <addons.mozilla.org> page.",
     "description": "Note in the popup when opened on addons.mozilla.org in Firefox >= 59"
   },
+  "unreachableAMOHintNewFF": {
+    "message": "In Firefox 60 and newer you'll also have to to remove AMO domain from <extensions.webextensions.restrictedDomains> in <about:config>.",
+    "description": "Note in the popup when opened on addons.mozilla.org in Firefox >= 59"
+  },
   "unreachableAMOHintOldFF": {
     "message": "Only Firefox 59 and newer can be configured to allow WebExtensions to add style elements on CSP-protected sites such as this one.",
     "description": "Note in the popup when opened on addons.mozilla.org in Firefox < 59"
diff --git a/js/dom.js b/js/dom.js
index ed12aaf1..674ee509 100644
--- a/js/dom.js
+++ b/js/dom.js
@@ -224,7 +224,9 @@ function $create(selector = 'div', properties, children) {
 
   const element = ns
     ? document.createElementNS(ns === 'SVG' || ns === 'svg' ? 'http://www.w3.org/2000/svg' : ns, tag)
-    : document.createElement(tag || 'div');
+    : tag === 'fragment'
+      ? document.createDocumentFragment()
+      : document.createElement(tag || 'div');
 
   for (const child of Array.isArray(children) ? children : [children]) {
     if (child) {
diff --git a/popup/popup.js b/popup/popup.js
index 801b00f7..df59a533 100644
--- a/popup/popup.js
+++ b/popup/popup.js
@@ -129,12 +129,14 @@ function initPopup() {
       const info = template.unreachableInfo;
       if (FIREFOX && tabURL.startsWith(URLS.browserWebStore)) {
         $('label', info).textContent = t('unreachableAMO');
-        $('p', info).insertAdjacentElement('afterend',
-          $create('p',
-            t(FIREFOX < 59 ? 'unreachableAMOHintOldFF' : 'unreachableAMOHint')
-              .split(/(<.*?>)/)
-              .map(s => s[0] === '<' ? $create('b', s.slice(1, -1)) : s)));
-        $('p', info).remove();
+        const note = (FIREFOX < 59 ? t('unreachableAMOHintOldFF') : t('unreachableAMOHint')) +
+                     (FIREFOX < 60 ? '' : '\n' + t('unreachableAMOHintNewFF'));
+        const renderToken = s => s[0] === '<' ? $create('b', s.slice(1, -1)) : s;
+        const renderLine = line => $create('p', line.split(/(<.*?>)/).map(renderToken));
+        const noteNode = $create('fragment', note.split('\n').map(renderLine));
+        const target = $('p', info);
+        target.parentNode.insertBefore(noteNode, target);
+        target.remove();
       }
       document.body.classList.add('unreachable');
       document.body.insertBefore(info, document.body.firstChild);