diff --git a/src/extensions/core/extensions/cloudBadges/comfy.ext.config.ts b/src/extensions/core/extensions/cloudBadges/comfy.ext.config.ts
index e6cde655b..7cc79f9f6 100644
--- a/src/extensions/core/extensions/cloudBadges/comfy.ext.config.ts
+++ b/src/extensions/core/extensions/cloudBadges/comfy.ext.config.ts
@@ -1,5 +1,7 @@
 import { defineComfyExtConfig } from '@/extensions/utils'
 
 export default defineComfyExtConfig({
+  name: 'Comfy.Cloud.Badges',
+  activationEvents: ['*'],
   comfyCloud: true,
 })
diff --git a/src/extensions/core/extensions/cloudFeedbackTopbarButton/comfy.ext.config.ts b/src/extensions/core/extensions/cloudFeedbackTopbarButton/comfy.ext.config.ts
index e6cde655b..6a7164e70 100644
--- a/src/extensions/core/extensions/cloudFeedbackTopbarButton/comfy.ext.config.ts
+++ b/src/extensions/core/extensions/cloudFeedbackTopbarButton/comfy.ext.config.ts
@@ -1,5 +1,7 @@
 import { defineComfyExtConfig } from '@/extensions/utils'
 
 export default defineComfyExtConfig({
+  name: 'Comfy.Cloud.FeedbackButton',
+  activationEvents: ['*'],
   comfyCloud: true,
 })
diff --git a/src/extensions/core/extensions/cloudRemoteConfig/comfy.ext.config.ts b/src/extensions/core/extensions/cloudRemoteConfig/comfy.ext.config.ts
index e6cde655b..393068a6f 100644
--- a/src/extensions/core/extensions/cloudRemoteConfig/comfy.ext.config.ts
+++ b/src/extensions/core/extensions/cloudRemoteConfig/comfy.ext.config.ts
@@ -1,5 +1,7 @@
 import { defineComfyExtConfig } from '@/extensions/utils'
 
 export default defineComfyExtConfig({
+  name: 'Comfy.Cloud.RemoteConfig',
+  activationEvents: ['*'],
   comfyCloud: true,
 })
diff --git a/src/extensions/core/extensions/cloudSessionCookie/comfy.ext.config.ts b/src/extensions/core/extensions/cloudSessionCookie/comfy.ext.config.ts
index e6cde655b..8356d90d6 100644
--- a/src/extensions/core/extensions/cloudSessionCookie/comfy.ext.config.ts
+++ b/src/extensions/core/extensions/cloudSessionCookie/comfy.ext.config.ts
@@ -1,5 +1,7 @@
 import { defineComfyExtConfig } from '@/extensions/utils'
 
 export default defineComfyExtConfig({
+  name: 'Comfy.Cloud.SessionCookie',
+  activationEvents: ['*'],
   comfyCloud: true,
 })
diff --git a/src/extensions/core/extensions/cloudSubscription/comfy.ext.config.ts b/src/extensions/core/extensions/cloudSubscription/comfy.ext.config.ts
index 059f2284f..7e5205812 100644
--- a/src/extensions/core/extensions/cloudSubscription/comfy.ext.config.ts
+++ b/src/extensions/core/extensions/cloudSubscription/comfy.ext.config.ts
@@ -1,6 +1,8 @@
 import { defineComfyExtConfig } from '@/extensions/utils'
 
 export default defineComfyExtConfig({
+  name: 'Comfy.Cloud.Subscription',
+  activationEvents: ['*'],
   comfyCloud: {
     subscriptionRequired: true,
   },
diff --git a/src/extensions/core/extensions/load3d/comfy.ext.config.ts b/src/extensions/core/extensions/load3d/comfy.ext.config.ts
new file mode 100644
index 000000000..426a973f7
--- /dev/null
+++ b/src/extensions/core/extensions/load3d/comfy.ext.config.ts
@@ -0,0 +1,111 @@
+import { defineComfyExtConfig } from '@/extensions/utils'
+
+export default defineComfyExtConfig({
+  name: 'Comfy.Load3D',
+  activationEvents: ['onWidgets:contributes', 'onCommands:contributes', 'onSettings:contributes'],
+  contributes: [
+    {
+      name: 'Comfy.Preview3D',
+      widgets: ['PREVIEW_3D'],
+    },
+    {
+      name: 'Comfy.Load3D',
+      widgets: ['LOAD_3D'],
+      settings: [
+        {
+          id: 'Comfy.Load3D.ShowGrid',
+          category: ['3D', 'Scene', 'Initial Grid Visibility'],
+          name: 'Initial Grid Visibility',
+          tooltip:
+            'Controls whether the grid is visible by default when a new 3D widget is created. This default can still be toggled individually for each widget after creation.',
+          type: 'boolean',
+          defaultValue: true,
+          experimental: true
+        },
+        {
+          id: 'Comfy.Load3D.BackgroundColor',
+          category: ['3D', 'Scene', 'Initial Background Color'],
+          name: 'Initial Background Color',
+          tooltip:
+            'Controls the default background color of the 3D scene. This setting determines the background appearance when a new 3D widget is created, but can be adjusted individually for each widget after creation.',
+          type: 'color',
+          defaultValue: '282828',
+          experimental: true
+        },
+        {
+          id: 'Comfy.Load3D.CameraType',
+          category: ['3D', 'Camera', 'Initial Camera Type'],
+          name: 'Initial Camera Type',
+          tooltip:
+            'Controls whether the camera is perspective or orthographic by default when a new 3D widget is created. This default can still be toggled individually for each widget after creation.',
+          type: 'combo',
+          options: ['perspective', 'orthographic'],
+          defaultValue: 'perspective',
+          experimental: true
+        },
+        {
+          id: 'Comfy.Load3D.LightIntensity',
+          category: ['3D', 'Light', 'Initial Light Intensity'],
+          name: 'Initial Light Intensity',
+          tooltip:
+            'Sets the default brightness level of lighting in the 3D scene. This value determines how intensely lights illuminate objects when a new 3D widget is created, but can be adjusted individually for each widget after creation.',
+          type: 'number',
+          defaultValue: 3,
+          experimental: true
+        },
+        {
+          id: 'Comfy.Load3D.LightIntensityMaximum',
+          category: ['3D', 'Light', 'Light Intensity Maximum'],
+          name: 'Light Intensity Maximum',
+          tooltip:
+            'Sets the maximum allowable light intensity value for 3D scenes. This defines the upper brightness limit that can be set when adjusting lighting in any 3D widget.',
+          type: 'number',
+          defaultValue: 10,
+          experimental: true
+        },
+        {
+          id: 'Comfy.Load3D.LightIntensityMinimum',
+          category: ['3D', 'Light', 'Light Intensity Minimum'],
+          name: 'Light Intensity Minimum',
+          tooltip:
+            'Sets the minimum allowable light intensity value for 3D scenes. This defines the lower brightness limit that can be set when adjusting lighting in any 3D widget.',
+          type: 'number',
+          defaultValue: 1,
+          experimental: true
+        },
+        {
+          id: 'Comfy.Load3D.LightAdjustmentIncrement',
+          category: ['3D', 'Light', 'Light Adjustment Increment'],
+          name: 'Light Adjustment Increment',
+          tooltip:
+            'Controls the increment size when adjusting light intensity in 3D scenes. A smaller step value allows for finer control over lighting adjustments, while a larger value results in more noticeable changes per adjustment.',
+          type: 'slider',
+          attrs: {
+            min: 0.1,
+            max: 1,
+            step: 0.1
+          },
+          defaultValue: 0.5,
+          experimental: true
+        },
+        {
+          id: 'Comfy.Load3D.3DViewerEnable',
+          category: ['3D', '3DViewer', 'Enable'],
+          name: 'Enable 3D Viewer (Beta)',
+          tooltip:
+            'Enables the 3D Viewer (Beta) for selected nodes. This feature allows you to visualize and interact with 3D models directly within the full size 3d viewer.',
+          type: 'boolean',
+          defaultValue: false,
+          experimental: true
+        }
+      ],
+      commands: [
+        {
+          id: 'Comfy.3DViewer.Open3DViewer',
+          icon: 'pi pi-pencil',
+          label: 'Open 3D Viewer (Beta) for Selected Node',
+        }
+      ],
+    },
+  ],
+})
diff --git a/src/extensions/core/extensions/saveMesh/comfy.ext.config.ts b/src/extensions/core/extensions/saveMesh/comfy.ext.config.ts
new file mode 100644
index 000000000..aea78abfc
--- /dev/null
+++ b/src/extensions/core/extensions/saveMesh/comfy.ext.config.ts
@@ -0,0 +1,12 @@
+import { defineComfyExtConfig } from '@/extensions/utils'
+
+export default defineComfyExtConfig({
+  name: 'Comfy.SaveGLB',
+  activationEvents: ['onWidgets:contributes', 'onCommands:contributes', 'onSettings:contributes'],
+  contributes: [
+    {
+      name: 'Comfy.SaveGLB',
+      widgets: ['SAVE_GLB'],
+    },
+  ],
+})
diff --git a/src/extensions/core/index.ts b/src/extensions/core/index.ts
index 54d02399f..c00d6a21d 100644
--- a/src/extensions/core/index.ts
+++ b/src/extensions/core/index.ts
@@ -1,14 +1,15 @@
 import { dispatchComfyExtensions } from '../dispatch'
+import type { ComfyExtensionConfigs, ComfyExtensionEntrance } from '../types'
 
-export async function importExtensions() {
+export async function registerExtensions() {
   console.log('importExtensions running...')
 
   const extConfigs = import.meta.glob(`./extensions/*/comfy.ext.config.ts`, {
     // Since each config is small, we only import the default export and use eager mode for better tree-shaking and performance.
     import: 'default',
     eager: true,
-  })
-  const extensionEntrance = import.meta.glob(`./extensions/*/index.ts`)
+  }) as ComfyExtensionConfigs
+  const extensionEntrance = import.meta.glob(`./extensions/*/index.ts`) as ComfyExtensionEntrance
 
   dispatchComfyExtensions({ configs: extConfigs, entrance: extensionEntrance })
 }
diff --git a/src/extensions/dispatch.ts b/src/extensions/dispatch.ts
index 3b81e5848..6a94dd92a 100644
--- a/src/extensions/dispatch.ts
+++ b/src/extensions/dispatch.ts
@@ -4,7 +4,7 @@ import type {
   ComfyExtensionEntrance,
   ComfyExtensionLoadContext
 } from './types'
-import { formatExtensions, shouldLoadExtension } from './utils'
+import { formatExtensions, normalizationActivationEvents } from './utils'
 
 const extLoadContext: ComfyExtensionLoadContext = {
   get isCloud() {
@@ -22,11 +22,61 @@ export async function dispatchComfyExtensions(options: {
   const { configs, entrance } = options
   const extensions = formatExtensions(entrance, configs)
   for (const extension of Object.values(extensions)) {
-    if (shouldLoadExtension(extLoadContext, extension.config)) {
-      const module = await extension.entry()
-      console.log('✅ extension', extension.name, 'loaded', extension, module)
+    // if (shouldLoadExtension(extLoadContext, extension.config)) {
+    //   const module = await extension.entry()
+    //   console.log('✅ extension', extension.name, 'loaded', extension, module)
+    // } else {
+    //   console.log('❌ extension', extension.name, 'disabled', extension.config)
+    // }
+    const activationEvents = normalizationActivationEvents(
+      extLoadContext,
+      extension.config
+    )
+    if (!activationEvents.length) {
+      console.log(
+        '❌ extension',
+        extension.name,
+        'has no activation events',
+        extension.config
+      )
     } else {
-      console.log('❌ extension', extension.name, 'disabled', extension.config)
+      console.log(
+        '🧶 extension',
+        extension.name,
+        'has activation events:',
+        activationEvents
+      )
     }
+    activationEvents.forEach((event) =>
+      onceExtImportEvent(event, async ({ event }) => {
+        console.log(
+          '✅ extension',
+          extension.name,
+          'loaded by',
+          event,
+          extension
+        )
+        await extension.entry()
+      })
+    )
+  }
+}
+
+type EventCallback = (ctx: { event: string }) => void | Promise<void>
+
+const eventMap = new Map<string, Set<EventCallback>>()
+
+export async function importExtensionsByEvent(event: string) {
+  const callbacks = eventMap.get(event)
+  if (!callbacks) return
+  eventMap.delete(event)
+  await Promise.all([...callbacks].map((cb) => cb({ event })))
+}
+
+function onceExtImportEvent(event: string, callback: EventCallback) {
+  if (eventMap.has(event)) {
+    eventMap.get(event)!.add(callback)
+  } else {
+    eventMap.set(event, new Set([callback]))
   }
 }
diff --git a/src/extensions/types.ts b/src/extensions/types.ts
index aa12c3415..fa788933c 100644
--- a/src/extensions/types.ts
+++ b/src/extensions/types.ts
@@ -1,4 +1,47 @@
+import type { ComfyExtension } from '@/types'
+
+// eslint-disable-next-line @typescript-eslint/no-unsafe-function-type
+type ExcludeFunctions<T> = T extends Function ? never : T
+type StaticOnly<T> = {
+  // eslint-disable-next-line prettier/prettier
+  [K in keyof T as ExcludeFunctions<T[K]> extends never ? never : K]: ExcludeFunctions<T[K]>
+}
+
+type StaticComfyCommand = StaticOnly<
+  NonNullable<ComfyExtension['commands']>[number]
+>
+type StaticComfySettingParams = StaticOnly<
+  NonNullable<ComfyExtension['settings']>[number]
+>
+type StaticComfyKeybinding = StaticOnly<
+  NonNullable<ComfyExtension['keybindings']>[number]
+>
+type StaticComfyMenuCommandGroup = StaticOnly<
+  NonNullable<ComfyExtension['menuCommands']>[number]
+>
+
+export type ComfyExtensionActivationEvent =
+  | '*'
+  | 'onWidgets:contributes'
+  | 'onCommands:contributes'
+  | 'onSettings:contributes'
+
+type ComfyExtensionContributes = {
+  name: string
+  widgets?: string[]
+  commands?: StaticComfyCommand[]
+  settings?: StaticComfySettingParams[]
+  keybindings?: StaticComfyKeybinding[]
+}
+
 export interface ComfyExtensionConfig {
+  name?: string
+
+  activationEvents: ComfyExtensionActivationEvent[]
+
+  contributes?: ComfyExtensionContributes | ComfyExtensionContributes[]
+  menuCommands?: StaticComfyMenuCommandGroup[]
+
   comfyCloud?:
     | boolean
     | {
diff --git a/src/extensions/utils.ts b/src/extensions/utils.ts
index cdad268e8..3d773da53 100644
--- a/src/extensions/utils.ts
+++ b/src/extensions/utils.ts
@@ -39,13 +39,64 @@ export function formatExtensions(
   return pkgs
 }
 
-export function shouldLoadExtension(
+export function normalizationActivationEvents(
   ctx: ComfyExtensionLoadContext,
-  extConfig: ComfyExtensionConfig | undefined
-): boolean {
-  // No Config -> Load Extension
-  if (!extConfig) return true
+  config: ComfyExtensionConfig | undefined
+): string[] {
+  if (!config) return ['*']
 
+  if (!checkAboutCloud(ctx, config)) return []
+
+  const { activationEvents, contributes: _contributes } = config
+
+  if (activationEvents.includes('*')) return ['*']
+
+  const contributes = _contributes
+    ? Array.isArray(_contributes)
+      ? _contributes
+      : [_contributes]
+    : []
+
+  const events: string[] = []
+
+  if (activationEvents.includes('onCommands:contributes')) {
+    for (const contribute of contributes) {
+      if (contribute.commands) {
+        for (const command of contribute.commands) {
+          events.push(`onCommands:${command}`)
+        }
+      }
+    }
+  }
+
+  if (activationEvents.includes('onSettings:contributes')) {
+    for (const contribute of contributes) {
+      if (contribute.settings) {
+        for (const setting of contribute.settings) {
+          events.push(`onSettings:${setting.id}`)
+        }
+      }
+    }
+  }
+
+  if (activationEvents.includes('onWidgets:contributes')) {
+    for (const contribute of contributes) {
+      events.push(`onWidgets:${contribute.name}`)
+      if (contribute.widgets) {
+        for (const widget of contribute.widgets) {
+          events.push(`onWidgets:${widget}`)
+        }
+      }
+    }
+  }
+
+  return events
+}
+
+function checkAboutCloud(
+  ctx: ComfyExtensionLoadContext,
+  extConfig: ComfyExtensionConfig
+): boolean {
   // Cloud Only Extension
   const { comfyCloud } = extConfig
   if (comfyCloud) {
diff --git a/src/services/extensionService.ts b/src/services/extensionService.ts
index 8e15ad137..ed705ecf9 100644
--- a/src/services/extensionService.ts
+++ b/src/services/extensionService.ts
@@ -12,6 +12,7 @@ import { useWidgetStore } from '@/stores/widgetStore'
 import { useBottomPanelStore } from '@/stores/workspace/bottomPanelStore'
 import type { ComfyExtension } from '@/types/comfy'
 import type { AuthUserInfo } from '@/types/authTypes'
+import { importExtensionsByEvent } from '@/extensions/dispatch'
 
 export const useExtensionService = () => {
   const extensionStore = useExtensionStore()
@@ -35,8 +36,12 @@ export const useExtensionService = () => {
 
     // Need to load core extensions first as some custom extensions
     // may depend on them.
-    const { importExtensions } = await import('../extensions/core/index')
-    await importExtensions()
+    const { registerExtensions } = await import('../extensions/core/index')
+    await registerExtensions()
+
+    // Import Immediately Loaded Extensions
+    await importExtensionsByEvent('*')
+
     extensionStore.captureCoreExtensions()
     await Promise.all(
       extensions