diff --git a/brozzler/cli.py b/brozzler/cli.py
index e3bc93c..c146a48 100755
--- a/brozzler/cli.py
+++ b/brozzler/cli.py
@@ -340,6 +340,9 @@ def brozzler_worker(argv=None):
     arg_parser.add_argument(
             '--skip-youtube-dl', dest='skip_youtube_dl',
             action='store_true', help=argparse.SUPPRESS)
+    arg_parser.add_argument(
+            '--stealth', dest='stealth', action='store_true',
+            help='Try to avoid web bot detection')
     add_common_options(arg_parser, argv)
 
     args = arg_parser.parse_args(args=argv[1:])
@@ -376,7 +379,8 @@ def brozzler_worker(argv=None):
             warcprox_auto=args.warcprox_auto,
             skip_extract_outlinks=args.skip_extract_outlinks,
             skip_visit_hashtags=args.skip_visit_hashtags,
-            skip_youtube_dl=args.skip_youtube_dl)
+            skip_youtube_dl=args.skip_youtube_dl,
+            stealth=args.stealth)
 
     signal.signal(signal.SIGQUIT, dump_state)
     signal.signal(signal.SIGTERM, lambda s,f: worker.stop())
diff --git a/brozzler/js-templates/stealth.js b/brozzler/js-templates/stealth.js
index dee3882..4835d2d 100644
--- a/brozzler/js-templates/stealth.js
+++ b/brozzler/js-templates/stealth.js
@@ -14,6 +14,34 @@ WebGLRenderingContext.prototype.getParameter = function(origFn) {
   };
 }(WebGLRenderingContext.prototype.getParameter);
 
+// This is `Linux x86_64` on Linux.
+Object.defineProperty(navigator, 'platform', {
+    get: () => 'Win32'
+});
+
+// Randomize navigator.deviceMemory and navigator.hardwareConcurrency to evade
+// browser fingerprinting.
+function getRandomInt(min, max) {
+  min = Math.ceil(min);
+  max = Math.floor(max);
+  return Math.floor(Math.random() * (max - min) + min); //The maximum is exclusive and the minimum is inclusive
+}
+
+Object.defineProperty(navigator, 'deviceMemory', {
+    get: () => getRandomInt(4, 32)
+});
+Object.defineProperty(navigator, 'hardwareConcurrency', {
+    get: () => getRandomInt(4, 32)
+});
+
+// Brozzler runs chrome with --disable-notifications which disables `window.Notification`.
+// This object is used for web bot detection and should be there.
+if (!window.Notification) {
+  window.Notification = {
+    permission: 'denied'
+  }
+}
+
 // TODO Add many more feature detection evations here. For example:
 // Mock navigator.permissions.query. In headful on secure origins the
 // permission should be "default", not "denied".
diff --git a/brozzler/model.py b/brozzler/model.py
index 689b268..8e35d0a 100644
--- a/brozzler/model.py
+++ b/brozzler/model.py
@@ -2,7 +2,7 @@
 brozzler/models.py - model classes representing jobs, sites, and pages, with
 related logic
 
-Copyright (C) 2014-2019 Internet Archive
+Copyright (C) 2014-2022 Internet Archive
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -18,7 +18,9 @@ limitations under the License.
 '''
 
 import brozzler
+import base64
 import cerberus
+import copy
 import datetime
 import doublethink
 import hashlib
@@ -31,6 +33,7 @@ import urlcanon
 import urllib
 import uuid
 import yaml
+import zlib
 from typing import Optional
 
 def load_schema():
@@ -275,17 +278,19 @@ class Site(doublethink.Document, ElapsedMixIn):
     def extra_headers(self, page: Optional["Page"] = None):
         hdrs = {}
         if self.warcprox_meta:
+            temp_warcprox_meta = copy.deepcopy(self.warcprox_meta)
+            if "blocks" in self.warcprox_meta:
+                # delete temp_warcprox_meta's 'blocks' (they may be big!)
+                del temp_warcprox_meta['blocks']
+                # str-ify blocks
+                blocks_str = json.dumps(self.warcprox_meta['blocks'], separators=(',', ':'))
+                # encode(), compress, b64encode, decode()
+                temp_warcprox_meta['compressed_blocks'] = base64.b64encode(zlib.compress(blocks_str.encode())).decode()
             if page is not None:
-                self.warcprox_meta["metadata"]["hop_path"] = page.hop_path
-                self.warcprox_meta["metadata"]["brozzled_url"] = page.url
-                self.warcprox_meta["metadata"]["hop_via_url"] = page.via_page_url
-                warcprox_meta_json = json.dumps(self.warcprox_meta, separators=(',', ':'))
-                del self.warcprox_meta["metadata"]["hop_path"]
-                del self.warcprox_meta["metadata"]["brozzled_url"]
-                del self.warcprox_meta["metadata"]["hop_via_url"]
-            else:
-                warcprox_meta_json= json.dumps(self.warcprox_meta, separators=(',', ':'))
-            hdrs["Warcprox-Meta"] = warcprox_meta_json
+                temp_warcprox_meta["metadata"]["hop_path"] = page.hop_path
+                temp_warcprox_meta["metadata"]["brozzled_url"] = page.url
+                temp_warcprox_meta["metadata"]["hop_via_url"] = page.via_page_url
+            hdrs["Warcprox-Meta"] = json.dumps(temp_warcprox_meta, separators=(',', ':'))
         return hdrs
 
     def accept_reject_or_neither(self, url, parent_page=None):
diff --git a/setup.py b/setup.py
index 0619b97..5119ff1 100644
--- a/setup.py
+++ b/setup.py
@@ -32,7 +32,7 @@ def find_package_data(package):
 
 setuptools.setup(
         name='brozzler',
-        version='1.5.29',
+        version='1.5.32',
         description='Distributed web crawling with browsers',
         url='https://github.com/internetarchive/brozzler',
         author='Noah Levitt',