diff --git a/app/javascript/mastodon/containers/media_container.jsx b/app/javascript/mastodon/containers/media_container.jsx
index fba3c5df78..d18602e3b5 100644
--- a/app/javascript/mastodon/containers/media_container.jsx
+++ b/app/javascript/mastodon/containers/media_container.jsx
@@ -80,7 +80,7 @@ export default class MediaContainer extends PureComponent {
     return (
       <IntlProvider>
         <>
-          {[].map.call(components, (component, i) => {
+          {Array.from(components).map((component, i) => {
             const componentName = component.getAttribute('data-component');
             const Component = MEDIA_COMPONENTS[componentName];
             const { media, card, poll, hashtag, ...props } = JSON.parse(component.getAttribute('data-props'));
diff --git a/app/javascript/mastodon/features/emoji/emoji_compressed.js b/app/javascript/mastodon/features/emoji/emoji_compressed.js
index a4863566da..ed8e9bbe30 100644
--- a/app/javascript/mastodon/features/emoji/emoji_compressed.js
+++ b/app/javascript/mastodon/features/emoji/emoji_compressed.js
@@ -36,7 +36,7 @@ Object.keys(emojiIndex.emojis).forEach(key => {
   let emoji = emojiIndex.emojis[key];
 
   // Emojis with skin tone modifiers are stored like this
-  if (Object.prototype.hasOwnProperty.call(emoji, '1')) {
+  if (Object.hasOwn(emoji, '1')) {
     emoji = emoji['1'];
   }
 
@@ -88,7 +88,7 @@ Object.keys(emojiIndex.emojis).forEach(key => {
   let emoji = emojiIndex.emojis[key];
 
   // Emojis with skin tone modifiers are stored like this
-  if (Object.prototype.hasOwnProperty.call(emoji, '1')) {
+  if (Object.hasOwn(emoji, '1')) {
     emoji = emoji['1'];
   }
 
diff --git a/app/javascript/mastodon/features/emoji/emoji_utils.js b/app/javascript/mastodon/features/emoji/emoji_utils.js
index 83bcc9d82f..c13d250567 100644
--- a/app/javascript/mastodon/features/emoji/emoji_utils.js
+++ b/app/javascript/mastodon/features/emoji/emoji_utils.js
@@ -135,19 +135,19 @@ function getData(emoji, skin, set) {
       }
     }
 
-    if (Object.prototype.hasOwnProperty.call(data.short_names, emoji)) {
+    if (Object.hasOwn(data.short_names, emoji)) {
       emoji = data.short_names[emoji];
     }
 
-    if (Object.prototype.hasOwnProperty.call(data.emojis, emoji)) {
+    if (Object.hasOwn(data.emojis, emoji)) {
       emojiData = data.emojis[emoji];
     }
   } else if (emoji.id) {
-    if (Object.prototype.hasOwnProperty.call(data.short_names, emoji.id)) {
+    if (Object.hasOwn(data.short_names, emoji.id)) {
       emoji.id = data.short_names[emoji.id];
     }
 
-    if (Object.prototype.hasOwnProperty.call(data.emojis, emoji.id)) {
+    if (Object.hasOwn(data.emojis, emoji.id)) {
       emojiData = data.emojis[emoji.id];
       skin = skin || emoji.skin;
     }
@@ -216,7 +216,7 @@ function deepMerge(a, b) {
     let originalValue = a[key],
       value = originalValue;
 
-    if (Object.prototype.hasOwnProperty.call(b, key)) {
+    if (Object.hasOwn(b, key)) {
       value = b[key];
     }
 
diff --git a/app/javascript/packs/admin.jsx b/app/javascript/packs/admin.jsx
index 343678c184..5f24d6677e 100644
--- a/app/javascript/packs/admin.jsx
+++ b/app/javascript/packs/admin.jsx
@@ -46,7 +46,7 @@ const hideSelectAll = () => {
 Rails.delegate(document, '#batch_checkbox_all', 'change', ({ target }) => {
   const selectAllMatchingElement = document.querySelector('.batch-table__select-all');
 
-  [].forEach.call(document.querySelectorAll(batchCheckboxClassName), (content) => {
+  document.querySelectorAll(batchCheckboxClassName).forEach((content) => {
     content.checked = target.checked;
   });
 
@@ -81,8 +81,11 @@ Rails.delegate(document, batchCheckboxClassName, 'change', () => {
   const selectAllMatchingElement = document.querySelector('.batch-table__select-all');
 
   if (checkAllElement) {
-    checkAllElement.checked = [].every.call(document.querySelectorAll(batchCheckboxClassName), (content) => content.checked);
-    checkAllElement.indeterminate = !checkAllElement.checked && [].some.call(document.querySelectorAll(batchCheckboxClassName), (content) => content.checked);
+    const allCheckboxes = Array.from(
+      document.querySelectorAll(batchCheckboxClassName)
+    );
+    checkAllElement.checked = allCheckboxes.every((content) => content.checked);
+    checkAllElement.indeterminate = !checkAllElement.checked && allCheckboxes.some((content) => content.checked);
 
     if (selectAllMatchingElement) {
       if (checkAllElement.checked) {
@@ -133,11 +136,11 @@ Rails.delegate(document, '#form_admin_settings_enable_bootstrap_timeline_account
 const onChangeRegistrationMode = (target) => {
   const enabled = target.value === 'approved';
 
-  [].forEach.call(document.querySelectorAll('.form_admin_settings_registrations_mode .warning-hint'), (warning_hint) => {
+  document.querySelectorAll('.form_admin_settings_registrations_mode .warning-hint').forEach((warning_hint) => {
     warning_hint.style.display = target.value === 'open' ? 'inline' : 'none';
   });
 
-  [].forEach.call(document.querySelectorAll('#form_admin_settings_require_invite_text'), (input) => {
+  document.querySelectorAll('#form_admin_settings_require_invite_text').forEach((input) => {
     input.disabled = !enabled;
     if (enabled) {
       let element = input;
@@ -183,8 +186,9 @@ ready(() => {
 
   const checkAllElement = document.querySelector('#batch_checkbox_all');
   if (checkAllElement) {
-    checkAllElement.checked = [].every.call(document.querySelectorAll(batchCheckboxClassName), (content) => content.checked);
-    checkAllElement.indeterminate = !checkAllElement.checked && [].some.call(document.querySelectorAll(batchCheckboxClassName), (content) => content.checked);
+    const allCheckboxes = Array.from(document.querySelectorAll(batchCheckboxClassName));
+    checkAllElement.checked = allCheckboxes.every( (content) => content.checked);
+    checkAllElement.indeterminate = !checkAllElement.checked && allCheckboxes.some((content) => content.checked);
   }
 
   document.querySelector('a#add-instance-button')?.addEventListener('click', (e) => {
@@ -197,7 +201,7 @@ ready(() => {
     }
   });
 
-  [].forEach.call(document.querySelectorAll('input[type="datetime-local"]'), element => {
+  document.querySelectorAll('input[type="datetime-local"]').forEach(element => {
     if (element.value) {
       element.value = convertUTCDateTimeToLocal(element.value);
     }
@@ -207,7 +211,7 @@ ready(() => {
   });
 
   Rails.delegate(document, 'form', 'submit', ({ target }) => {
-    [].forEach.call(target.querySelectorAll('input[type="datetime-local"]'), element => {
+    target.querySelectorAll('input[type="datetime-local"]').forEach(element => {
       if (element.value && element.validity.valid) {
         element.value = convertLocalDatetimeToUTC(element.value);
       }
@@ -219,7 +223,7 @@ ready(() => {
     setAnnouncementEndsAttributes(announcementStartsAt);
   }
 
-  [].forEach.call(document.querySelectorAll('[data-admin-component]'), element => {
+  document.querySelectorAll('[data-admin-component]').forEach(element => {
     const componentName  = element.getAttribute('data-admin-component');
     const componentProps = JSON.parse(element.getAttribute('data-props'));
 
diff --git a/app/javascript/packs/public.jsx b/app/javascript/packs/public.jsx
index 5edc355370..01b57dce39 100644
--- a/app/javascript/packs/public.jsx
+++ b/app/javascript/packs/public.jsx
@@ -73,11 +73,11 @@ function loaded() {
     return messageFormat.format(values);
   };
 
-  [].forEach.call(document.querySelectorAll('.emojify'), (content) => {
+  document.querySelectorAll('.emojify').forEach((content) => {
     content.innerHTML = emojify(content.innerHTML);
   });
 
-  [].forEach.call(document.querySelectorAll('time.formatted'), (content) => {
+  document.querySelectorAll('time.formatted').forEach((content) => {
     const datetime = new Date(content.getAttribute('datetime'));
     const formattedDate = dateTimeFormat.format(datetime);
 
@@ -94,7 +94,7 @@ function loaded() {
   };
   const todayFormat = new IntlMessageFormat(localeData['relative_format.today'] || 'Today at {time}', locale);
 
-  [].forEach.call(document.querySelectorAll('time.relative-formatted'), (content) => {
+  document.querySelectorAll('time.relative-formatted').forEach((content) => {
     const datetime = new Date(content.getAttribute('datetime'));
 
     let formattedContent;
@@ -111,7 +111,7 @@ function loaded() {
     content.textContent = formattedContent;
   });
 
-  [].forEach.call(document.querySelectorAll('time.time-ago'), (content) => {
+  document.querySelectorAll('time.time-ago').forEach((content) => {
     const datetime = new Date(content.getAttribute('datetime'));
     const now      = new Date();
 
@@ -128,8 +128,8 @@ function loaded() {
   if (reactComponents.length > 0) {
     import(/* webpackChunkName: "containers/media_container" */ '../mastodon/containers/media_container')
       .then(({ default: MediaContainer }) => {
-        [].forEach.call(reactComponents, (component) => {
-          [].forEach.call(component.children, (child) => {
+        reactComponents.forEach((component) => {
+          Array.from(component.children).forEach((child) => {
             component.removeChild(child);
           });
         });
@@ -185,7 +185,7 @@ function loaded() {
     return false;
   });
 
-  [].forEach.call(document.querySelectorAll('.status__content__spoiler-link'), (spoilerLink) => {
+  document.querySelectorAll('.status__content__spoiler-link').forEach((spoilerLink) => {
     const statusEl = spoilerLink.parentNode.parentNode;
     const message = (statusEl.dataset.spoiler === 'expanded') ? (localeData['status.show_less'] || 'Show less') : (localeData['status.show_more'] || 'Show more');
     spoilerLink.textContent = (new IntlMessageFormat(message, locale)).format();
diff --git a/public/embed.js b/public/embed.js
index defba403e4..f8e6a22db4 100644
--- a/public/embed.js
+++ b/public/embed.js
@@ -31,6 +31,8 @@
 
       var iframe = iframes.get(data.id);
 
+      if(!iframe) return;
+
       if ('source' in e && iframe.contentWindow !== e.source) {
         return;
       }
@@ -38,7 +40,7 @@
       iframe.height = data.height;
     });
 
-    [].forEach.call(document.querySelectorAll('iframe.mastodon-embed'), function (iframe) {
+    document.querySelectorAll('iframe.mastodon-embed').forEach(iframe => {
       // select unique id for each iframe
       var id = 0, failCount = 0, idBuffer = new Uint32Array(1);
       while (id === 0 || iframes.has(id)) {
diff --git a/streaming/index.js b/streaming/index.js
index fa30260a3a..154ecbc02c 100644
--- a/streaming/index.js
+++ b/streaming/index.js
@@ -192,7 +192,7 @@ const pgConfigFromEnv = (env) => {
     if (!baseConfig.password && env.DB_PASS) {
       baseConfig.password = env.DB_PASS;
     }
-  } else if (Object.hasOwnProperty.call(pgConfigs, environment)) {
+  } else if (Object.hasOwn(pgConfigs, environment)) {
     baseConfig = pgConfigs[environment];
 
     if (env.DB_SSLMODE) {
@@ -912,7 +912,7 @@ const startServer = async () => {
           // If the payload already contains the `filtered` property, it means
           // that filtering has been applied on the ruby on rails side, as
           // such, we don't need to construct or apply the filters in streaming:
-          if (Object.prototype.hasOwnProperty.call(payload, "filtered")) {
+          if (Object.hasOwn(payload, "filtered")) {
             transmit(event, payload);
             return;
           }