diff --git a/extensions/llamacpp-extension/src/backend.ts b/extensions/llamacpp-extension/src/backend.ts
index d60ecc138..a313e01c6 100644
--- a/extensions/llamacpp-extension/src/backend.ts
+++ b/extensions/llamacpp-extension/src/backend.ts
@@ -1,9 +1,8 @@
 import { getJanDataFolderPath, fs, joinPath, events } from '@janhq/core'
 import { invoke } from '@tauri-apps/api/core'
-import { getProxyConfig } from './util'
+import { getProxyConfig, basenameNoExt } from './util'
 import { dirname, basename } from '@tauri-apps/api/path'
 import { getSystemInfo } from '@janhq/tauri-plugin-hardware-api'
-
 /*
  * Reads currently installed backends in janDataFolderPath
  *
@@ -73,10 +72,7 @@ async function fetchRemoteSupportedBackends(
 
       if (!name.startsWith(prefix)) continue
 
-      const backend = name
-        .replace(prefix, '')
-        .replace('.tar.gz', '')
-        .replace('.zip', '')
+      const backend = basenameNoExt(name).slice(prefix.length)
 
       if (supportedBackends.includes(backend)) {
         remote.push({ version, backend })
diff --git a/extensions/llamacpp-extension/src/util.ts b/extensions/llamacpp-extension/src/util.ts
index 1511eafec..b72766579 100644
--- a/extensions/llamacpp-extension/src/util.ts
+++ b/extensions/llamacpp-extension/src/util.ts
@@ -1,3 +1,23 @@
+// File path utilities
+export function basenameNoExt(filePath: string): string {
+  const VALID_EXTENSIONS = [".tar.gz", ".zip"];
+  
+  // handle VALID extensions first
+  for (const ext of VALID_EXTENSIONS) {
+    if (filePath.toLowerCase().endsWith(ext)) {
+      return filePath.slice(0, -ext.length);
+    }
+  }
+  
+  // fallback: remove only the last extension
+  const lastDotIndex = filePath.lastIndexOf('.');
+  if (lastDotIndex > 0) {
+    return filePath.slice(0, lastDotIndex);
+  }
+  
+  return filePath;
+}
+
 // Zustand proxy state structure
 interface ProxyState {
   proxyEnabled: boolean
diff --git a/src-tauri/src/core/downloads/helpers.rs b/src-tauri/src/core/downloads/helpers.rs
index 137bbdd3d..e46d18868 100644
--- a/src-tauri/src/core/downloads/helpers.rs
+++ b/src-tauri/src/core/downloads/helpers.rs
@@ -465,7 +465,11 @@ async fn download_single_file(
         .await
         .map_err(err_to_string)?;
 
-    log::info!("Started downloading: {}", item.url);
+    // Decode URL for better readability in logs
+    let decoded_url = url::Url::parse(&item.url)
+        .map(|u| u.to_string())
+        .unwrap_or_else(|_| item.url.clone());
+    log::info!("Started downloading: {}", decoded_url);
     let client = _get_client_for_item(item, &header_map).map_err(err_to_string)?;
     let mut download_delta = 0u64;
     let mut initial_progress = 0u64;
@@ -584,7 +588,11 @@ async fn download_single_file(
         .await
         .map_err(err_to_string)?;
 
-    log::info!("Finished downloading: {}", item.url);
+    // Decode URL for better readability in logs
+    let decoded_url = url::Url::parse(&item.url)
+        .map(|u| u.to_string())
+        .unwrap_or_else(|_| item.url.clone());
+    log::info!("Finished downloading: {}", decoded_url);
     Ok(save_path.to_path_buf())
 }
 
diff --git a/web-app/src/lib/utils.ts b/web-app/src/lib/utils.ts
index 60a055720..d9bfa0ecb 100644
--- a/web-app/src/lib/utils.ts
+++ b/web-app/src/lib/utils.ts
@@ -1,11 +1,28 @@
 import { type ClassValue, clsx } from 'clsx'
 import { twMerge } from 'tailwind-merge'
 import { ExtensionManager } from './extension'
+import path from "path"
 
 export function cn(...inputs: ClassValue[]) {
   return twMerge(clsx(inputs))
 }
 
+
+export function basenameNoExt(filePath: string): string {
+  const base = path.basename(filePath);
+  const VALID_EXTENSIONS = [".tar.gz", ".zip"];
+
+  // handle VALID extensions first
+  for (const ext of VALID_EXTENSIONS) {
+    if (base.toLowerCase().endsWith(ext)) {
+      return base.slice(0, -ext.length);
+    }
+  }
+
+  // fallback: remove only the last extension
+  return base.slice(0, -path.extname(base).length);
+}
+
 export function getProviderLogo(provider: string) {
   switch (provider) {
     case 'jan':
diff --git a/web-app/src/routes/settings/providers/$providerName.tsx b/web-app/src/routes/settings/providers/$providerName.tsx
index 06fed3713..c2fc293de 100644
--- a/web-app/src/routes/settings/providers/$providerName.tsx
+++ b/web-app/src/routes/settings/providers/$providerName.tsx
@@ -41,6 +41,7 @@ import { useLlamacppDevices } from '@/hooks/useLlamacppDevices'
 import { PlatformFeatures } from '@/lib/platform/const'
 import { PlatformFeature } from '@/lib/platform/types'
 import { useBackendUpdater } from '@/hooks/useBackendUpdater'
+import { basenameNoExt } from '@/lib/utils'
 
 // as route.threadsDetail
 export const Route = createFileRoute('/settings/providers/$providerName')({
@@ -382,7 +383,7 @@ function ProviderDetail() {
         filters: [
           {
             name: 'Backend Archives',
-            extensions: ['tar.gz', 'zip'],
+            extensions: ['tar.gz', 'zip', 'gz'],
           },
         ],
       })
@@ -394,9 +395,7 @@ function ProviderDetail() {
         await installBackend(selectedFile)
 
         // Extract filename from the selected file path and replace spaces with dashes
-        const fileName = (
-          selectedFile.split(/[/\\]/).pop() || selectedFile
-        ).replace(/\s+/g, '-')
+        const fileName = basenameNoExt(selectedFile).replace(/\s+/g, "-")
 
         toast.success(t('settings:backendInstallSuccess'), {
           description: `Llamacpp ${fileName} installed`,
diff --git a/web-app/src/services/dialog/tauri.ts b/web-app/src/services/dialog/tauri.ts
index faafbb3c8..1b4efad28 100644
--- a/web-app/src/services/dialog/tauri.ts
+++ b/web-app/src/services/dialog/tauri.ts
@@ -9,7 +9,16 @@ import { DefaultDialogService } from './default'
 export class TauriDialogService extends DefaultDialogService {
   async open(options?: DialogOpenOptions): Promise<string | string[] | null> {
     try {
-      return await open(options)
+      console.log('TauriDialogService: Opening dialog with options:', options)
+      if (options?.filters) {
+        console.log('TauriDialogService: File filters:', options.filters)
+        options.filters.forEach((filter, index) => {
+          console.log(`TauriDialogService: Filter ${index} - Name: "${filter.name}", Extensions:`, filter.extensions)
+        })
+      }
+      const result = await open(options)
+      console.log('TauriDialogService: Dialog result:', result)
+      return result
     } catch (error) {
       console.error('Error opening dialog in Tauri:', error)
       return null
diff --git a/web-app/src/services/dialog/web.ts b/web-app/src/services/dialog/web.ts
index bb24024f1..c735cbf41 100644
--- a/web-app/src/services/dialog/web.ts
+++ b/web-app/src/services/dialog/web.ts
@@ -19,10 +19,14 @@ export class WebDialogService implements DialogService {
       }
 
       if (options?.filters) {
+        console.log('WebDialogService: Processing file filters:', options.filters)
         const extensions = options.filters.flatMap(filter => 
           filter.extensions.map(ext => `.${ext}`)
         )
-        input.accept = extensions.join(',')
+        console.log('WebDialogService: Generated extensions with dots:', extensions)
+        const acceptString = extensions.join(',')
+        console.log('WebDialogService: Final accept attribute:', acceptString)
+        input.accept = acceptString
       }
 
       input.onchange = (e) => {