diff --git a/brozzler/cli.py b/brozzler/cli.py
index bea5153..ba6b702 100755
--- a/brozzler/cli.py
+++ b/brozzler/cli.py
@@ -165,6 +165,20 @@ class BetterArgumentDefaultsHelpFormatter(argparse.ArgumentDefaultsHelpFormatter
             return super()._get_help_string(action)
 
 
+import enum
+
+
+class Env(str, enum.Enum):
+    """Values of the Prometheus ``env`` label applied to a
+    :py:class:`.Registration` indicating the deployment environment in which
+    the service being advertised is operating.
+    """
+
+    qa = "qa"
+    prod = "prod"
+    dev = "dev"
+
+
 def brozzle_page(argv=None):
     """
     Command line utility entry point for brozzling a single page. Opens url in
@@ -234,6 +248,24 @@ def brozzle_page(argv=None):
         action="store_true",
         help="Try to avoid web bot detection",
     )
+    arg_parser.add_argument(
+        "--registry_url",
+        dest="registry_url",
+        default=None,
+        help="Prometheus registry url",
+    )
+    arg_parser.add_argument(
+        "--metrics_port",
+        dest=metrics_port,
+        default=8889,
+        help="Prometheus metrics port",
+    )
+    arg_parser.add_argument(
+        "--env",
+        dest=env,
+        default=Env.dev,
+        help="Prometheus env value",
+    )
     arg_parser.add_argument(
         "--screenshot-full-page", dest="screenshot_full_page", action="store_true"
     )
@@ -279,6 +311,9 @@ def brozzle_page(argv=None):
         window_height=args.window_height,
         window_width=args.window_width,
         stealth=args.stealth,
+        registry_url=args.registry_url,
+        metrics_port=args.metrics_port,
+        env=args.env,
     )
 
     def on_screenshot(screenshot_jpeg):
@@ -517,6 +552,24 @@ def brozzler_worker(argv=None):
         action="store_true",
         help="Try to avoid web bot detection",
     )
+    arg_parser.add_argument(
+        "--registry_url",
+        dest="registry_url",
+        default=None,
+        help="Prometheus registry url",
+    )
+    arg_parser.add_argument(
+        "--metrics_port",
+        dest=metrics_port,
+        default=8888,
+        help="Prometheus metrics port",
+    )
+    arg_parser.add_argument(
+        "--env",
+        dest=env,
+        default=Env.qa,
+        help="Prometheus env value",
+    )
     add_common_options(arg_parser, argv)
 
     args = arg_parser.parse_args(args=argv[1:])
@@ -573,6 +626,9 @@ def brozzler_worker(argv=None):
         skip_visit_hashtags=args.skip_visit_hashtags,
         skip_youtube_dl=args.skip_youtube_dl,
         stealth=args.stealth,
+        registry_url=args.registry_url,
+        metrics_port=args.metrics_port,
+        env=args.env,
     )
 
     signal.signal(signal.SIGQUIT, dump_state)
diff --git a/brozzler/metrics.py b/brozzler/metrics.py
index 9fa3321..cbfa768 100644
--- a/brozzler/metrics.py
+++ b/brozzler/metrics.py
@@ -18,7 +18,7 @@ except ImportError:
     class Env(str, enum.Enum):
         """Values of the Prometheus ``env`` label applied to a
         :py:class:`.Registration` indicating the deployment environment in which
-        the the service being advertised is operating.
+        the service being advertised is operating.
         """
 
         qa = "qa"
diff --git a/brozzler/worker.py b/brozzler/worker.py
index 3f3c04a..0d221c6 100644
--- a/brozzler/worker.py
+++ b/brozzler/worker.py
@@ -28,7 +28,6 @@ import json
 import PIL.Image
 import io
 import socket
-import platform
 import random
 import requests
 import doublethink
@@ -42,18 +41,6 @@ from . import ydl
 r = rdb.RethinkDB()
 
 
-# Setup metrics
-registry_url = None
-metrics_port = 8090
-env = metrics.Env.dev
-hostname = platform.node()
-if hostname.endswith("archive.org"):
-    registry_url = "http://wbgrp-svc283.us.archive.org:8888"
-    metrics_port = settings.metrics_port
-    env = metrics.Env.qa
-metrics.register_prom_metrics(registry_url, metrics_port, env)
-
-
 class BrozzlerWorker:
     logger = logging.getLogger(__module__ + "." + __qualname__)
 
@@ -85,6 +72,9 @@ class BrozzlerWorker:
         stealth=False,
         window_height=900,
         window_width=1400,
+        registry_url=None,
+        metrics_port=None,
+        env=None,
     ):
         self._frontier = frontier
         self._service_registry = service_registry
@@ -107,6 +97,9 @@ class BrozzlerWorker:
         self._window_height = window_height
         self._window_width = window_width
         self._stealth = stealth
+        self._registry_url = registry_url
+        self._metrics_port = metrics_port
+        self._env = env
 
         self._browser_pool = brozzler.browser.BrowserPool(
             max_browsers, chrome_exe=chrome_exe, ignore_cert_errors=True
@@ -118,6 +111,12 @@ class BrozzlerWorker:
         self._start_stop_lock = threading.Lock()
         self._shutdown = threading.Event()
 
+        # Setup metrics
+        registry_url = self._registry_url
+        metrics_port = self._metrics_port
+        env = self._env
+        metrics.register_prom_metrics(registry_url, metrics_port, env)
+
     def _choose_warcprox(self):
         warcproxes = self._service_registry.available_services("warcprox")
         if not warcproxes:
diff --git a/brozzler/ydl.py b/brozzler/ydl.py
index 2f07e9d..dcae69b 100644
--- a/brozzler/ydl.py
+++ b/brozzler/ydl.py
@@ -297,7 +297,7 @@ def _remember_videos(page, pushed_videos=None):
 
 def _try_youtube_dl(worker, ydl, site, page):
     ytdlp_url = page.redirect_url if page.redirect_url else page.url
-    ytdlp_host = ytdlp_url.split("//")[-1].split("/")[0].split('?')[0]
+    ytdlp_host = ytdlp_url.split("//")[-1].split("/")[0].split("?")[0]
     try:
         logging.info("trying yt-dlp on %s", ytdlp_url)
         metrics.brozzler_ydl_download_attempts.labels(ytdlp_host).inc(1)