diff --git a/brozzler/chrome.py b/brozzler/chrome.py
index d47b0a5..cf107fd 100644
--- a/brozzler/chrome.py
+++ b/brozzler/chrome.py
@@ -206,6 +206,7 @@ class Chrome:
             "--disable-extensions",
             "--disable-save-password-bubble",
             "--disable-sync",
+            "--disable-features=OptimizationGuideModelDownloading,OptimizationHintsFetching,OptimizationTargetPrediction,OptimizationHints",
         ]
         major_version = check_version(self.chrome_exe)
         if major_version >= 109:
diff --git a/brozzler/cli.py b/brozzler/cli.py
index 7182c5b..c97917e 100755
--- a/brozzler/cli.py
+++ b/brozzler/cli.py
@@ -547,6 +547,12 @@ def brozzler_worker(argv=None):
         default="/tmp",
         help="argparse.SUPPRESS",
     )
+    arg_parser.add_argument(
+        "--ytdlp_proxy_file",
+        dest="ytdlp_proxy_file",
+        default="/opt/local/brozzler/ytdlp_proxy_endpoints.txt",
+        help="argparse.SUPPRESS",
+    )
     arg_parser.add_argument(
         "--stealth",
         dest="stealth",
@@ -600,7 +606,7 @@ def brozzler_worker(argv=None):
             signal.signal(signal.SIGQUIT, dump_state)
 
     def get_ytdlp_proxy_endpoints():
-        YTDLP_PROXY_ENDPOINTS_FILE = "/opt/local/brozzler/ytdlp_proxy_endpoints.txt"
+        YTDLP_PROXY_ENDPOINTS_FILE = args.ytdlp_proxy_file
         try:
             # make list from file
             with open(YTDLP_PROXY_ENDPOINTS_FILE) as endpoints:
diff --git a/setup.py b/setup.py
index 4fcbac1..d24826e 100644
--- a/setup.py
+++ b/setup.py
@@ -34,7 +34,7 @@ def find_package_data(package):
 
 setuptools.setup(
     name="brozzler",
-    version="1.6.6.a4",
+    version="1.6.6.a5",
     description="Distributed web crawling with browsers",
     url="https://github.com/internetarchive/brozzler",
     author="Noah Levitt",