diff --git a/src/components/dialog/content/setting/ExtensionPanel.vue b/src/components/dialog/content/setting/ExtensionPanel.vue
index 94480b4f2c..6022d4c57f 100644
--- a/src/components/dialog/content/setting/ExtensionPanel.vue
+++ b/src/components/dialog/content/setting/ExtensionPanel.vue
@@ -5,7 +5,12 @@
         v-model="filters['global'].value"
         :placeholder="$t('g.searchExtensions') + '...'"
       />
-      <Message v-if="hasChanges" severity="info" pt:text="w-full">
+      <Message
+        v-if="hasChanges"
+        severity="info"
+        pt:text="w-full"
+        class="max-h-96 overflow-y-auto"
+      >
         <ul>
           <li v-for="ext in changedExtensions" :key="ext.name">
             <span>
@@ -30,7 +35,15 @@
       size="small"
       :filters="filters"
     >
-      <Column field="name" :header="$t('g.extensionName')" sortable></Column>
+      <Column :header="$t('g.extensionName')" sortable>
+        <template #body="slotProps">
+          {{ slotProps.data.name }}
+          <Tag
+            v-if="extensionStore.isCoreExtension(slotProps.data.name)"
+            value="Core"
+          />
+        </template>
+      </Column>
       <Column
         :pt="{
           headerCell: 'flex items-center justify-end',
@@ -48,9 +61,7 @@
         </template>
         <template #body="slotProps">
           <ToggleSwitch
-            :disabled="
-              extensionStore.isExtensionAlwaysEnabled(slotProps.data.name)
-            "
+            :disabled="extensionStore.isExtensionReadOnly(slotProps.data.name)"
             v-model="editingEnabledExtensions[slotProps.data.name]"
             @change="updateExtensionStatus"
           />
@@ -67,6 +78,7 @@ import { useSettingStore } from '@/stores/settingStore'
 import DataTable from 'primevue/datatable'
 import Column from 'primevue/column'
 import ToggleSwitch from 'primevue/toggleswitch'
+import Tag from 'primevue/tag'
 import Button from 'primevue/button'
 import ContextMenu from 'primevue/contextmenu'
 import Message from 'primevue/message'
@@ -117,6 +129,8 @@ const updateExtensionStatus = () => {
 
 const enableAllExtensions = () => {
   extensionStore.extensions.forEach((ext) => {
+    if (extensionStore.isExtensionReadOnly(ext.name)) return
+
     editingEnabledExtensions.value[ext.name] = true
   })
   updateExtensionStatus()
@@ -124,7 +138,16 @@ const enableAllExtensions = () => {
 
 const disableAllExtensions = () => {
   extensionStore.extensions.forEach((ext) => {
-    if (extensionStore.isExtensionAlwaysEnabled(ext.name)) return
+    if (extensionStore.isExtensionReadOnly(ext.name)) return
+
+    editingEnabledExtensions.value[ext.name] = false
+  })
+  updateExtensionStatus()
+}
+
+const disableThirdPartyExtensions = () => {
+  extensionStore.extensions.forEach((ext) => {
+    if (extensionStore.isCoreExtension(ext.name)) return
 
     editingEnabledExtensions.value[ext.name] = false
   })
@@ -147,6 +170,12 @@ const contextMenuItems = [
     label: 'Disable All',
     icon: 'pi pi-times',
     command: disableAllExtensions
+  },
+  {
+    label: 'Disable 3rd Party',
+    icon: 'pi pi-times',
+    command: disableThirdPartyExtensions,
+    disabled: !extensionStore.hasThirdPartyExtensions
   }
 ]
 </script>
diff --git a/src/scripts/app.ts b/src/scripts/app.ts
index a59b62b92d..444a1fbe83 100644
--- a/src/scripts/app.ts
+++ b/src/scripts/app.ts
@@ -1640,13 +1640,15 @@ export class ComfyApp {
    * Loads all extensions from the API into the window in parallel
    */
   async #loadExtensions() {
-    useExtensionStore().loadDisabledExtensionNames()
+    const extensionStore = useExtensionStore()
+    extensionStore.loadDisabledExtensionNames()
 
     const extensions = await api.getExtensions()
 
     // Need to load core extensions first as some custom extensions
     // may depend on them.
     await import('../extensions/core/index')
+    extensionStore.captureCoreExtensions()
     await Promise.all(
       extensions
         .filter((extension) => !extension.includes('extensions/core'))
diff --git a/src/stores/extensionStore.ts b/src/stores/extensionStore.ts
index b9b3420eea..b534da884b 100644
--- a/src/stores/extensionStore.ts
+++ b/src/stores/extensionStore.ts
@@ -19,6 +19,17 @@ export const ALWAYS_ENABLED_EXTENSIONS: readonly string[] = [
   'Comfy.ColorPalette'
 ]
 
+export const ALWAYS_DISABLED_EXTENSIONS: readonly string[] = [
+  // pysssss.Locking is replaced by pin/unpin in ComfyUI core.
+  // https://github.com/Comfy-Org/litegraph.js/pull/117
+  'pysssss.Locking',
+  // pysssss.SnapToGrid is replaced by Comfy.Graph.AlwaysSnapToGrid in ComfyUI core.
+  // pysssss.SnapToGrid tries to write global app.shiftDown state, which is no longer
+  // allowed since v1.3.12.
+  // https://github.com/Comfy-Org/ComfyUI_frontend/issues/1176
+  'pysssss.SnapToGrid'
+]
+
 export const useExtensionStore = defineStore('extension', () => {
   // For legacy reasons, the name uniquely identifies an extension
   const extensionByName = ref<Record<string, ComfyExtension>>({})
@@ -42,8 +53,11 @@ export const useExtensionStore = defineStore('extension', () => {
     return extensions.value.filter((ext) => isExtensionEnabled(ext.name))
   })
 
-  function isExtensionAlwaysEnabled(name: string) {
-    return ALWAYS_ENABLED_EXTENSIONS.includes(name)
+  function isExtensionReadOnly(name: string) {
+    return (
+      ALWAYS_DISABLED_EXTENSIONS.includes(name) ||
+      ALWAYS_ENABLED_EXTENSIONS.includes(name)
+    )
   }
 
   function registerExtension(extension: ComfyExtension) {
@@ -86,20 +100,31 @@ export const useExtensionStore = defineStore('extension', () => {
     disabledExtensionNames.value = new Set(
       useSettingStore().get('Comfy.Extension.Disabled')
     )
-    // pysssss.Locking is replaced by pin/unpin in ComfyUI core.
-    // https://github.com/Comfy-Org/litegraph.js/pull/117
-    disabledExtensionNames.value.add('pysssss.Locking')
-    // pysssss.SnapToGrid is replaced by Comfy.Graph.AlwaysSnapToGrid in ComfyUI core.
-    // pysssss.SnapToGrid tries to write global app.shiftDown state, which is no longer
-    // allowed since v1.3.12.
-    // https://github.com/Comfy-Org/ComfyUI_frontend/issues/1176
-    disabledExtensionNames.value.add('pysssss.SnapToGrid')
-
+    for (const name of ALWAYS_DISABLED_EXTENSIONS) {
+      disabledExtensionNames.value.add(name)
+    }
     for (const name of ALWAYS_ENABLED_EXTENSIONS) {
       disabledExtensionNames.value.delete(name)
     }
   }
 
+  /**
+   * Core extensions are extensions that are defined in the core package.
+   * See /extensions/core/index.ts for the list.
+   */
+  const coreExtensionNames = ref<string[]>([])
+  function captureCoreExtensions() {
+    coreExtensionNames.value = app.extensions.map((ext) => ext.name)
+  }
+
+  function isCoreExtension(name: string) {
+    return coreExtensionNames.value.includes(name)
+  }
+
+  const hasThirdPartyExtensions = computed(() => {
+    return extensions.value.some((ext) => !isCoreExtension(ext.name))
+  })
+
   // Some core extensions are registered before the store is initialized, e.g.
   // colorPalette.
   // Register them manually here so the state of app.extensions and
@@ -113,8 +138,11 @@ export const useExtensionStore = defineStore('extension', () => {
     enabledExtensions,
     inactiveDisabledExtensionNames,
     isExtensionEnabled,
-    isExtensionAlwaysEnabled,
+    isExtensionReadOnly,
     registerExtension,
-    loadDisabledExtensionNames
+    loadDisabledExtensionNames,
+    captureCoreExtensions,
+    isCoreExtension,
+    hasThirdPartyExtensions
   }
 })