diff --git a/edit/edit.js b/edit/edit.js
index f037bf89..104aba5e 100644
--- a/edit/edit.js
+++ b/edit/edit.js
@@ -1963,7 +1963,7 @@ function showHelp(title, text) {
       ((e.keyCode || e.which) === 27 && !e.altKey && !e.ctrlKey && !e.shiftKey && !e.metaKey)
     ) {
       div.style.display = '';
-      document.querySelector('.contents').innerHTML = '';
+      document.querySelector('.contents').textContent = '';
       document.removeEventListener('keydown', closeHelp);
     }
   }
diff --git a/manage/manage.js b/manage/manage.js
index 3d11308a..08e8feec 100644
--- a/manage/manage.js
+++ b/manage/manage.js
@@ -519,7 +519,7 @@ function switchUI({styleOnly} = {}) {
 
   const missingFavicons = newUI.enabled && newUI.favicons && !$('.applies-to img');
   if (changed.enabled || (missingFavicons && !createStyleElement.parts)) {
-    installed.innerHTML = '';
+    installed.textContent = '';
     getStylesSafe().then(showStyles);
     return;
   }