diff --git a/public/electron.js b/public/electron.js
index d741f3a12..9b1576790 100644
--- a/public/electron.js
+++ b/public/electron.js
@@ -784,6 +784,51 @@ ipcMain.handle('download-optedout-mods', async (e, { mods, instancePath }) => {
                 error: false,
                 warning: true
               });
+            } else if (details.statusCode > 400) {
+              /**
+               * Check for Cloudflare blocking automated downloads.
+               *
+               * Sometimes, Cloudflare prevents the internal browser from navigating to the
+               * Curseforge mod download page and starting the download. The HTTP status code
+               * it returns is (generally) either 403 or 503. The code below retrieves the
+               * HTML of the page returned to the browser and checks for the title and some
+               * content on the page to determine if the returned page is Cloudflare.
+               * Unfortunately using the `webContents.getTitle()` returns an empty string.
+               */
+              details.webContents
+                .executeJavaScript(
+                  `
+                    function getHTML () {
+                      return new Promise((resolve, reject) => { resolve(document.documentElement.innerHTML); });
+                    }
+                    getHTML();
+                  `
+                )
+                .then(content => {
+                  const isCloudflare =
+                    content.includes('Just a moment...') &&
+                    content.includes(
+                      'needs to review the security of your connection before proceeding.'
+                    );
+
+                  if (isCloudflare) {
+                    resolve();
+                    mainWindow.webContents.send(
+                      'opted-out-download-mod-status',
+                      {
+                        modId: modManifest.id,
+                        error: false,
+                        warning: true,
+                        cloudflareBlock: true
+                      }
+                    );
+                  }
+
+                  return null;
+                })
+                .catch(() => {
+                  // no-op
+                });
             }
           }
         );
@@ -934,7 +979,7 @@ ipcMain.handle('installUpdateAndQuitOrRestart', async (e, quitAfterInstall) => {
 
     await fs.writeFile(
       path.join(tempFolder, updaterVbs),
-      `Set WshShell = CreateObject("WScript.Shell") 
+      `Set WshShell = CreateObject("WScript.Shell")
           WshShell.Run chr(34) & "${path.join(
             tempFolder,
             updaterBat
diff --git a/src/common/modals/OptedOutModsList.js b/src/common/modals/OptedOutModsList.js
index 3c27083c3..a47d53a72 100644
--- a/src/common/modals/OptedOutModsList.js
+++ b/src/common/modals/OptedOutModsList.js
@@ -3,7 +3,10 @@ import { LoadingOutlined } from '@ant-design/icons';
 import { useDispatch, useSelector } from 'react-redux';
 import { Button, Spin } from 'antd';
 import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
-import { faExclamationTriangle } from '@fortawesome/free-solid-svg-icons';
+import {
+  faExclamationTriangle,
+  faFileDownload
+} from '@fortawesome/free-solid-svg-icons';
 import { ipcRenderer } from 'electron';
 import styled from 'styled-components';
 import Modal from '../components/Modal';
@@ -56,7 +59,14 @@ const RowContainer = styled.div`
   }
 `;
 
-const ModRow = ({ mod, loadedMods, currentMod, missingMods }) => {
+const ModRow = ({
+  mod,
+  loadedMods,
+  currentMod,
+  missingMods,
+  cloudflareBlock,
+  downloadUrl
+}) => {
   const { modManifest, addon } = mod;
   const loaded = loadedMods.includes(modManifest.id);
   const missing = missingMods.includes(modManifest.id);
@@ -77,8 +87,8 @@ const ModRow = ({ mod, loadedMods, currentMod, missingMods }) => {
   return (
     <RowContainer ref={ref}>
       <div>{`${addon?.name} - ${modManifest?.displayName}`}</div>
-      {loaded && !missing && <div className="dot" />}
-      {loaded && missing && (
+      {loaded && !missing && !cloudflareBlock && <div className="dot" />}
+      {loaded && missing && !cloudflareBlock && (
         <FontAwesomeIcon
           icon={faExclamationTriangle}
           css={`
@@ -86,6 +96,11 @@ const ModRow = ({ mod, loadedMods, currentMod, missingMods }) => {
           `}
         />
       )}
+      {loaded && !missing && cloudflareBlock && (
+        <Button href={downloadUrl}>
+          <FontAwesomeIcon icon={faFileDownload} />
+        </Button>
+      )}
       {!loaded && isCurrentMod && (
         <Spin indicator={<LoadingOutlined style={{ fontSize: 24 }} spin />} />
       )}
@@ -102,6 +117,8 @@ const OptedOutModsList = ({
 }) => {
   const [loadedMods, setLoadedMods] = useState([]);
   const [missingMods, setMissingMods] = useState([]);
+  const [cloudflareBlock, setCloudflareBlock] = useState(false);
+  const [manualDownloadUrls, setManualDownloadUrls] = useState([]);
   const [downloading, setDownloading] = useState(false);
 
   const dispatch = useDispatch();
@@ -135,14 +152,21 @@ const OptedOutModsList = ({
     const listener = (e, status) => {
       if (!status.error) {
         if (optedOutMods.length === loadedMods.length + 1) {
-          if (missingMods.length === 0) {
+          if (missingMods.length === 0 && !cloudflareBlock) {
             resolve();
             dispatch(closeModal());
           }
           setDownloading(false);
         }
         setLoadedMods(prev => [...prev, status.modId]);
-        if (status.warning) setMissingMods(prev => [...prev, status.modId]);
+        if (status.warning) {
+          if (!status.cloudflareBlock) {
+            setMissingMods(prev => [...prev, status.modId]);
+          } else {
+            setCloudflareBlock(true);
+            setManualDownloadUrls(prev => [...prev, status.modId]);
+          }
+        }
       } else {
         dispatch(closeModal());
         setTimeout(() => {
@@ -159,7 +183,7 @@ const OptedOutModsList = ({
         listener
       );
     };
-  }, [loadedMods, missingMods]);
+  }, [loadedMods, missingMods, cloudflareBlock, manualDownloadUrls]);
 
   return (
     <Modal
@@ -191,15 +215,32 @@ const OptedOutModsList = ({
         </div>
         <ModsContainer>
           {optedOutMods &&
-            optedOutMods.map(mod => (
-              <ModRow
-                mod={mod}
-                loadedMods={loadedMods}
-                currentMod={currentMod}
-                missingMods={missingMods}
-              />
-            ))}
+            optedOutMods.map(mod => {
+              return (
+                <ModRow
+                  mod={mod}
+                  loadedMods={loadedMods}
+                  currentMod={currentMod}
+                  missingMods={missingMods}
+                  cloudflareBlock={cloudflareBlock}
+                  downloadUrl={`${mod.addon.links.websiteUrl}/download/${mod.modManifest.id}`}
+                />
+              );
+            })}
         </ModsContainer>
+        {cloudflareBlock && (
+          <p
+            css={`
+              width: 90%;
+              margin: 20px auto 0 auto;
+            `}
+          >
+            Cloudflare is currently blocking automated downloads. You can
+            manually download the mods and place them in the mods folder to
+            continue. Use the download buttons in the rows above, and the button
+            below to open the instance folder.
+          </p>
+        )}
         <div
           css={`
             display: flex;
@@ -224,7 +265,7 @@ const OptedOutModsList = ({
           >
             Cancel
           </Button>
-          {missingMods.length === 0 && (
+          {missingMods.length === 0 && !cloudflareBlock && (
             <Button
               type="primary"
               disabled={downloading}
@@ -257,7 +298,7 @@ const OptedOutModsList = ({
               Confirm
             </Button>
           )}
-          {missingMods.length > 0 && (
+          {missingMods.length > 0 && !cloudflareBlock && (
             <Button
               type="primary"
               disabled={downloading}
@@ -272,6 +313,36 @@ const OptedOutModsList = ({
               Continue
             </Button>
           )}
+          {cloudflareBlock && (
+            <>
+              <Button
+                type="primary"
+                disabled={downloading}
+                onClick={() => {
+                  ipcRenderer.invoke('openFolder', instancePath);
+                }}
+                css={`
+                  background-color: ${props => props.theme.palette.colors.blue};
+                `}
+              >
+                Open folder
+              </Button>
+              <Button
+                type="primary"
+                disabled={downloading}
+                onClick={() => {
+                  resolve();
+                  dispatch(closeModal());
+                }}
+                css={`
+                  background-color: ${props =>
+                    props.theme.palette.colors.green};
+                `}
+              >
+                Continue
+              </Button>
+            </>
+          )}
         </div>
       </Container>
     </Modal>