diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 0e4acfeef47..1381a0f2ea9 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -204,6 +204,8 @@ jobs:
             f.write( 'ARNOLD_ROOT=%s\n' % arnoldRoot )
       env:
         PYTHONUTF8: 1
+        ARNOLD_DOWNLOAD_USER: ${{ secrets.ARNOLD_DOWNLOAD_USER }}
+        ARNOLD_DOWNLOAD_PASSWORD: ${{ secrets.ARNOLD_DOWNLOAD_PASSWORD }}
       shell: python
 
     - name: Build Docs and Package
diff --git a/.github/workflows/main/installArnold.py b/.github/workflows/main/installArnold.py
index 404d225377a..bbcc89da07d 100755
--- a/.github/workflows/main/installArnold.py
+++ b/.github/workflows/main/installArnold.py
@@ -36,15 +36,12 @@
 import sys
 import argparse
 import os
+import pathlib
+import shutil
 import subprocess
-import urllib
+import urllib.request
 import zipfile
 
-if sys.version_info[0] < 3 :
-    from urllib import urlretrieve
-else:
-    from urllib.request import urlretrieve
-
 platform = { "darwin" : "darwin", "win32" : "windows" }.get( sys.platform, "linux" )
 format = { "win32" : "zip" }.get( sys.platform, "tgz" )
 
@@ -65,15 +62,29 @@
 
 url="https://forgithubci.solidangle.com/arnold/{}".format( archive )
 
-installDir = os.path.join( "arnoldRoot", args.version )
-os.makedirs( installDir )
-os.chdir( installDir )
+installDir = pathlib.Path.cwd() / "arnoldRoot" / args.version
+installDir.mkdir( parents = True, exist_ok = True )
+archiveFile = installDir /  archive
 
 print( "Downloading Arnold \"{}\"".format( url ) )
-archiveFile, headers = urlretrieve( url )
+
+passwordManager = urllib.request.HTTPPasswordMgrWithDefaultRealm()
+passwordManager.add_password(
+    realm = None,
+    uri = url,
+    user = os.environ["ARNOLD_DOWNLOAD_USER"],
+    passwd = os.environ["ARNOLD_DOWNLOAD_PASSWORD"]
+)
+
+authHandler = urllib.request.HTTPBasicAuthHandler( passwordManager )
+opener = urllib.request.build_opener( authHandler )
+
+with opener.open( url ) as inFile :
+    with open( archiveFile, "wb" ) as outFile :
+        shutil.copyfileobj( inFile, outFile )
 
 if format == "tgz" :
-    subprocess.check_call( [ "tar", "-xzf", archiveFile ] )
+    subprocess.check_call( [ "tar", "-xzf", archiveFile, "-C", installDir ] )
 elif format == "zip":
     with zipfile.ZipFile( archiveFile ) as f :
-        f.extractall()
+        f.extractall( path = installDir )
diff --git a/Changes.md b/Changes.md
index 09f3f106311..1d6a5352afa 100644
--- a/Changes.md
+++ b/Changes.md
@@ -119,7 +119,7 @@ Build
 Improvements
 ------------
 
-- ArnoldShader, ArnoldColorManager : Improved browsers for file parameters (#5592) :
+- ArnoldShader, ArnoldColorManager, CyclesShader : Improved browsers for file parameters (#5592, #5602) :
   - Added filtering by extension.
   - Added bookmarks.
 - USDLight : Added file browser for `shaping:ies:file` parameter.
diff --git a/python/GafferCyclesUI/CyclesShaderUI.py b/python/GafferCyclesUI/CyclesShaderUI.py
index a2dd5df1b2a..1905b0b964a 100644
--- a/python/GafferCyclesUI/CyclesShaderUI.py
+++ b/python/GafferCyclesUI/CyclesShaderUI.py
@@ -43,6 +43,7 @@
 import Gaffer
 import GafferUI
 import GafferCycles
+import GafferImage
 
 ##########################################################################
 # Build a registry of information retrieved from GafferCycles metadata.
@@ -84,7 +85,12 @@ def __translateParamMetadata( nodeTypeName, socketName, value ) :
 		__metadata[paramPath]["plugValueWidget:type"] = "GafferUI.PresetsPlugValueWidget"
 
 	if( socketName == "filename" ) :
-		__metadata[paramPath]["plugValueWidget:type"] = "GafferUI.PathPlugValueWidget"
+		__metadata[paramPath]["plugValueWidget:type"] = "GafferUI.FileSystemPathPlugValueWidget"
+		__metadata[paramPath]["path:leaf"] = True
+		__metadata[paramPath]["path:valid"] = True
+		__metadata[paramPath]["path:bookmarks"] = "texture"
+		__metadata[paramPath]["fileSystemPath:extensions"] = " ".join( GafferImage.OpenImageIOReader.supportedExtensions() )
+		__metadata[paramPath]["fileSystemPath:extensionsLabel"] = "Show only image files"
 
 	__metadata[paramPath]["noduleLayout:visible"] = True
 	__metadata[paramPath]["label"] = label