diff --git a/scripts/helpers.js b/scripts/helpers.js
index 08d455e8..9f3a5871 100644
--- a/scripts/helpers.js
+++ b/scripts/helpers.js
@@ -3502,7 +3502,7 @@ async function appendTweet(t, timelineContainer, options = {}) {
                     if (item.type === 'photo') {
                         url.searchParams.set("name", "orig"); // force original resolution
                     }
-                    fetch(url).then(res => res.blob()).then(blob => {
+                    _fetch(url).then(res => res.blob()).then(blob => {
                         downloading = false;
                         let a = document.createElement('a');
                         a.href = URL.createObjectURL(blob);
diff --git a/scripts/twchallenge.js b/scripts/twchallenge.js
index e730a272..100d0bde 100644
--- a/scripts/twchallenge.js
+++ b/scripts/twchallenge.js
@@ -66,7 +66,7 @@ window.addEventListener('message', e => {
     }
 });
 
-let _fetch = window.fetch;
+window._fetch = window.fetch;
 fetch = async function(url, options) {
     if(!url.startsWith('https://twitter.com/i/api') && !url.startsWith('https://api.twitter.com')) return _fetch(url, options);
     if(!options) options = {};
diff --git a/scripts/tweetviewer.js b/scripts/tweetviewer.js
index bcaf03bc..aef482a8 100644
--- a/scripts/tweetviewer.js
+++ b/scripts/tweetviewer.js
@@ -2442,7 +2442,7 @@ class TweetViewer {
                 downloading = true;
                 let media = t.extended_entities.media[0];
                 let url = media.type === 'photo' ? media.media_url_https : media.video_info.variants[0].url;
-                fetch(url).then(res => res.blob()).then(blob => {
+                _fetch(url).then(res => res.blob()).then(blob => {
                     downloading = false;
                     let a = document.createElement('a');
                     a.href = URL.createObjectURL(blob);