diff --git a/static/webui/script.js b/static/webui/script.js
index a2a1be52..0c023d44 100644
--- a/static/webui/script.js
+++ b/static/webui/script.js
@@ -1093,25 +1093,30 @@ function doAddAllMods() {
             }
 
             modsAll = Array.from(modsAll);
-            // Batch to avoid PayloadTooLargeError
-            const batches = [];
-            for (let i = 0; i < modsAll.length; i += 1000) {
-                batches.push(modsAll.slice(i, i + 1000));
-            }
-            batches.forEach(batch => {
-                $.post({
-                    url: "/api/missionInventoryUpdate.php?" + window.authz,
-                    contentType: "text/plain",
-                    data: JSON.stringify({
-                        RawUpgrades: batch.map(mod => ({
-                            ItemType: mod,
-                            ItemCount: 21 // To fully upgrade certain arcanes
-                        }))
-                    })
-                }).done(function () {
-                    updateInventory();
+            if (
+                modsAll.length != 0 &&
+                window.confirm("Are you sure you want to add " + modsAll.length + " mods to your account?")
+            ) {
+                // Batch to avoid PayloadTooLargeError
+                const batches = [];
+                for (let i = 0; i < modsAll.length; i += 1000) {
+                    batches.push(modsAll.slice(i, i + 1000));
+                }
+                batches.forEach(batch => {
+                    $.post({
+                        url: "/api/missionInventoryUpdate.php?" + window.authz,
+                        contentType: "text/plain",
+                        data: JSON.stringify({
+                            RawUpgrades: batch.map(mod => ({
+                                ItemType: mod,
+                                ItemCount: 21 // To fully upgrade certain arcanes
+                            }))
+                        })
+                    }).done(function () {
+                        updateInventory();
+                    });
                 });
-            });
+            }
         });
     });
 }