diff --git a/packages/nc-gui/components/extensions/Pane.vue b/packages/nc-gui/components/extensions/Pane.vue
index 54b54c329e..dfe8aa85fe 100644
--- a/packages/nc-gui/components/extensions/Pane.vue
+++ b/packages/nc-gui/components/extensions/Pane.vue
@@ -17,8 +17,6 @@ const {
 
 const { $e } = useNuxtApp()
 
-const isReady = ref(false)
-
 const searchExtensionRef = ref<HTMLInputElement>()
 
 const extensionHeaderRef = ref<HTMLDivElement>()
@@ -27,6 +25,13 @@ const searchQuery = ref<string>('')
 
 const showSearchBox = ref(false)
 
+const panelSize = computed(() => {
+  if (isPanelExpanded.value) {
+    return extensionPanelSize.value
+  }
+  return 0
+})
+
 const { width } = useElementSize(extensionHeaderRef)
 
 const isOpenSearchBox = computed(() => {
@@ -54,14 +59,6 @@ const toggleMarket = () => {
   isMarketVisible.value = !isMarketVisible.value
 }
 
-const normalizePaneMaxWidth = computed(() => {
-  if (isReady.value) {
-    return 60
-  } else {
-    return extensionPanelSize.value
-  }
-})
-
 const onMove = async (_event: { moved: { newIndex: number; oldIndex: number; element: ExtensionType } }) => {
   let {
     moved: { newIndex = 0, oldIndex = 0, element },
@@ -100,20 +97,6 @@ const onMove = async (_event: { moved: { newIndex: number; oldIndex: number; ele
   $e('a:extension:reorder')
 }
 
-defineExpose({
-  onReady: () => {
-    isReady.value = true
-  },
-})
-
-watch(isPanelExpanded, (newValue) => {
-  if (newValue && !isReady.value) {
-    setTimeout(() => {
-      isReady.value = true
-    }, 300)
-  }
-})
-
 onClickOutside(searchExtensionRef, () => {
   if (searchQuery.value) {
     return
@@ -130,125 +113,119 @@ onMounted(() => {
 </script>
 
 <template>
-  <Pane
-    v-if="isPanelExpanded"
-    :size="extensionPanelSize"
-    min-size="10%"
-    max-size="60%"
-    class="nc-extension-pane"
-    :style="{
-      minWidth: isReady ? '300px' : `${normalizePaneMaxWidth}%`,
-      maxWidth: `${normalizePaneMaxWidth}%`,
-    }"
-  >
-    <div
-      ref="extensionHeaderRef"
-      class="h-[var(--toolbar-height)] flex items-center gap-3 px-4 py-2 border-b-1 border-gray-200 bg-white"
-    >
-      <div
-        class="flex items-center gap-3 font-weight-700 text-gray-700 text-base"
-        :class="{
-          'flex-1': !isOpenSearchBox,
-        }"
-      >
-        <GeneralIcon icon="ncPuzzleSolid" class="h-5 w-5 text-gray-700 opacity-85" />
-        <span v-if="!isOpenSearchBox || width >= 507">Extensions</span>
-      </div>
-      <div
-        class="flex justify-end"
-        :class="{
-          'flex-1': isOpenSearchBox,
-        }"
-      >
-        <NcButton v-if="!isOpenSearchBox" size="xs" type="text" class="!px-1" @click="handleShowSearchInput">
-          <GeneralIcon icon="search" class="flex-none !text-gray-500" />
-        </NcButton>
-        <div v-else class="flex flex-grow items-center justify-end !max-w-[300px]">
-          <a-input
-            ref="searchExtensionRef"
-            v-model:value="searchQuery"
-            type="text"
-            class="nc-input-border-on-value !h-7 !px-3 !py-1 !rounded-lg"
-            placeholder="Search Extension"
-            allow-clear
-            @keydown.esc="handleCloseSearchbox"
+  <Pane :size="panelSize" max-size="60%" class="nc-extension-pane">
+    <Transition name="layout" :duration="150">
+      <div v-if="isPanelExpanded" class="flex flex-col">
+        <div
+          ref="extensionHeaderRef"
+          class="h-[var(--toolbar-height)] flex items-center gap-3 px-4 py-2 border-b-1 border-gray-200 bg-white"
+        >
+          <div
+            class="flex items-center gap-3 font-weight-700 text-gray-700 text-base"
+            :class="{
+              'flex-1': !isOpenSearchBox,
+            }"
           >
-            <template #prefix>
-              <GeneralIcon icon="search" class="mr-2 h-4 w-4 text-gray-500 group-hover:text-black" />
-            </template>
-          </a-input>
-        </div>
-      </div>
-      <NcButton type="secondary" size="xs" @click="toggleMarket">
-        <div class="flex items-center gap-1 text-xs max-w-full -ml-3px">
-          <GeneralIcon icon="plus" />
-          {{ $t('general.install') }}
-        </div>
-      </NcButton>
-    </div>
-    <template v-if="extensionList.length === 0">
-      <div class="flex items-center flex-col gap-4 w-full nc-scrollbar-md text-center p-4">
-        <GeneralIcon icon="ncPuzzleSolid" class="h-12 w-12 flex-none mt-[120px] text-gray-500 !stroke-transparent" />
-
-        <div class="font-weight-700 text-base">No extensions added</div>
-        <div class="text-sm text-gray-700">Add Extensions from the community extensions marketplace</div>
-        <NcButton size="small" @click="toggleMarket">
-          <div class="flex items-center gap-1 -ml-3px">
-            <GeneralIcon icon="plus" />
-            {{ $t('general.install') }}
+            <GeneralIcon icon="ncPuzzleSolid" class="h-5 w-5 text-gray-700 opacity-85" />
+            <span v-if="!isOpenSearchBox || width >= 507">Extensions</span>
           </div>
-        </NcButton>
-        <!-- Todo: add docs link  -->
-        <NcButton size="small" type="secondary">
-          <div class="flex items-center gap-1.5">
-            <GeneralIcon icon="externalLink" />
-            {{ $t('activity.goToDocs') }}
-          </div>
-        </NcButton>
-      </div>
-    </template>
-    <template v-else>
-      <Draggable
-        :model-value="filteredExtensionList"
-        draggable=".nc-extension-item"
-        item-key="id"
-        handle=".nc-extension-drag-handler"
-        ghost-class="ghost"
-        class="nc-extension-list-wrapper flex items-center flex-col gap-3 w-full nc-scrollbar-md py-4"
-        :class="{
-          'h-full': searchQuery && !filteredExtensionList.length && extensionList.length,
-        }"
-        @start="(e) => e.target.classList.add('grabbing')"
-        @end="(e) => e.target.classList.remove('grabbing')"
-        @change="onMove($event)"
-      >
-        <template #item="{ element: ext }">
-          <div class="nc-extension-item w-full">
-            <ExtensionsWrapper :extension-id="ext.id" />
+          <div
+            class="flex justify-end"
+            :class="{
+              'flex-1': isOpenSearchBox,
+            }"
+          >
+            <NcButton v-if="!isOpenSearchBox" size="xs" type="text" class="!px-1" @click="handleShowSearchInput">
+              <GeneralIcon icon="search" class="flex-none !text-gray-500" />
+            </NcButton>
+            <div v-else class="flex flex-grow items-center justify-end !max-w-[300px]">
+              <a-input
+                ref="searchExtensionRef"
+                v-model:value="searchQuery"
+                type="text"
+                class="nc-input-border-on-value !h-7 !px-3 !py-1 !rounded-lg"
+                placeholder="Search Extension"
+                allow-clear
+                @keydown.esc="handleCloseSearchbox"
+              >
+                <template #prefix>
+                  <GeneralIcon icon="search" class="mr-2 h-4 w-4 text-gray-500 group-hover:text-black" />
+                </template>
+              </a-input>
+            </div>
           </div>
-        </template>
-        <template v-if="searchQuery && !filteredExtensionList.length && extensionList.length" #header>
-          <div class="w-full h-full flex-1 flex items-center justify-center">
-            <div class="pb-6 text-gray-500 flex flex-col items-center gap-6 text-center">
-              <img
-                src="~assets/img/placeholder/no-search-result-found.png"
-                class="!w-[164px] flex-none"
-                alt="No search results found"
-              />
-
-              {{ $t('title.noResultsMatchedYourSearch') }}
+          <NcButton type="secondary" size="xs" @click="toggleMarket">
+            <div class="flex items-center gap-1 text-xs max-w-full -ml-3px">
+              <GeneralIcon icon="plus" />
+              {{ $t('general.install') }}
             </div>
+          </NcButton>
+        </div>
+        <template v-if="extensionList.length === 0">
+          <div class="flex items-center flex-col gap-4 w-full nc-scrollbar-md text-center p-4">
+            <GeneralIcon icon="ncPuzzleSolid" class="h-12 w-12 flex-none mt-[120px] text-gray-500 !stroke-transparent" />
+
+            <div class="font-weight-700 text-base">No extensions added</div>
+            <div class="text-sm text-gray-700">Add Extensions from the community extensions marketplace</div>
+            <NcButton size="small" @click="toggleMarket">
+              <div class="flex items-center gap-1 -ml-3px">
+                <GeneralIcon icon="plus" />
+                {{ $t('general.install') }}
+              </div>
+            </NcButton>
+            <!-- Todo: add docs link  -->
+            <NcButton size="small" type="secondary">
+              <div class="flex items-center gap-1.5">
+                <GeneralIcon icon="externalLink" />
+                {{ $t('activity.goToDocs') }}
+              </div>
+            </NcButton>
           </div>
         </template>
-      </Draggable>
-    </template>
-    <ExtensionsMarket v-if="isMarketVisible" v-model="isMarketVisible" />
-    <ExtensionsDetails
-      v-if="isDetailsVisible && detailsExtensionId"
-      v-model="isDetailsVisible"
-      :extension-id="detailsExtensionId"
-      :from="detailsFrom"
-    />
+        <template v-else>
+          <Draggable
+            :model-value="filteredExtensionList"
+            draggable=".nc-extension-item"
+            item-key="id"
+            handle=".nc-extension-drag-handler"
+            ghost-class="ghost"
+            class="nc-extension-list-wrapper flex items-center flex-col gap-3 w-full nc-scrollbar-md py-4"
+            :class="{
+              'h-full': searchQuery && !filteredExtensionList.length && extensionList.length,
+            }"
+            @start="(e) => e.target.classList.add('grabbing')"
+            @end="(e) => e.target.classList.remove('grabbing')"
+            @change="onMove($event)"
+          >
+            <template #item="{ element: ext }">
+              <div class="nc-extension-item w-full">
+                <ExtensionsWrapper :extension-id="ext.id" />
+              </div>
+            </template>
+            <template v-if="searchQuery && !filteredExtensionList.length && extensionList.length" #header>
+              <div class="w-full h-full flex-1 flex items-center justify-center">
+                <div class="pb-6 text-gray-500 flex flex-col items-center gap-6 text-center">
+                  <img
+                    src="~assets/img/placeholder/no-search-result-found.png"
+                    class="!w-[164px] flex-none"
+                    alt="No search results found"
+                  />
+
+                  {{ $t('title.noResultsMatchedYourSearch') }}
+                </div>
+              </div>
+            </template>
+          </Draggable>
+        </template>
+        <ExtensionsMarket v-if="isMarketVisible" v-model="isMarketVisible" />
+        <ExtensionsDetails
+          v-if="isDetailsVisible && detailsExtensionId"
+          v-model="isDetailsVisible"
+          :extension-id="detailsExtensionId"
+          :from="detailsFrom"
+        />
+      </div>
+    </Transition>
   </Pane>
 </template>
 
diff --git a/packages/nc-gui/components/tabs/Smartsheet.vue b/packages/nc-gui/components/tabs/Smartsheet.vue
index 2d4ced89da..1260d3532e 100644
--- a/packages/nc-gui/components/tabs/Smartsheet.vue
+++ b/packages/nc-gui/components/tabs/Smartsheet.vue
@@ -80,8 +80,6 @@ useProvideSmartsheetLtarHelpers(meta)
 
 const grid = ref()
 
-const extensionPaneRef = ref()
-
 const onDrop = async (event: DragEvent) => {
   event.preventDefault()
   try {
@@ -161,36 +159,40 @@ watch([activeViewTitleOrId, activeTableId], () => {
   handleSidebarOpenOnMobileForNonViews()
 })
 
+const { leftSidebarWidth, windowSize } = storeToRefs(useSidebarStore())
+
 const { isPanelExpanded, extensionPanelSize } = useExtensions()
 
+const contentSize = computed(() => {
+  if (isPanelExpanded.value && extensionPanelSize.value) {
+    return 100 - extensionPanelSize.value
+  } else {
+    return 100
+  }
+})
+
+const contentMaxSize = computed(() => {
+  if (!isPanelExpanded.value) {
+    return 100
+  } else {
+    return ((windowSize.value - leftSidebarWidth.value - 300) / (windowSize.value - leftSidebarWidth.value)) * 100
+  }
+})
+
 const onResize = (sizes: { min: number; max: number; size: number }[]) => {
   if (sizes.length === 2) {
     if (!sizes[1].size) return
     extensionPanelSize.value = sizes[1].size
   }
 }
-
-const onReady = () => {
-  if (isPanelExpanded.value && extensionPaneRef.value) {
-    // wait until extension pane animation complete
-    setTimeout(() => {
-      extensionPaneRef.value?.onReady()
-    }, 300)
-  }
-}
 </script>
 
 <template>
   <div class="nc-container flex flex-col h-full" @drop="onDrop" @dragover.prevent>
     <LazySmartsheetTopbar />
     <div style="height: calc(100% - var(--topbar-height))">
-      <Splitpanes
-        v-if="openedViewsTab === 'view'"
-        class="nc-extensions-content-resizable-wrapper"
-        @ready="onReady"
-        @resized="onResize"
-      >
-        <Pane class="flex flex-col h-full min-w-0" :size="isPanelExpanded && extensionPanelSize ? 100 - extensionPanelSize : 100">
+      <Splitpanes v-if="openedViewsTab === 'view'" class="nc-extensions-content-resizable-wrapper" @resized="onResize">
+        <Pane class="flex flex-col h-full min-w-0" :max-size="contentMaxSize" :size="contentSize">
           <LazySmartsheetToolbar v-if="!isForm" />
           <div
             :style="{ height: isForm || isMobileMode ? '100%' : 'calc(100% - var(--toolbar-height))' }"
@@ -217,7 +219,7 @@ const onReady = () => {
             </Transition>
           </div>
         </Pane>
-        <ExtensionsPane ref="extensionPaneRef" />
+        <ExtensionsPane />
       </Splitpanes>
       <SmartsheetDetails v-else />
     </div>