diff --git a/copyparty/__main__.py b/copyparty/__main__.py
index ac85c8df..24617f4f 100644
--- a/copyparty/__main__.py
+++ b/copyparty/__main__.py
@@ -437,7 +437,8 @@ def run_argparse(argv, formatter):
         default=".vq,.aq,vc,ac,res,.fps")
     ap2.add_argument("-mtp", metavar="M=[f,]bin", type=u, action="append", help="read tag M using bin")
 
-    ap2 = ap.add_argument_group('appearance options')
+    ap2 = ap.add_argument_group('ui options')
+    ap2.add_argument("--js-browser", metavar="L", type=u, help="URL to additional JS to include")
     ap2.add_argument("--css-browser", metavar="L", type=u, help="URL to additional CSS to include")
 
     ap2 = ap.add_argument_group('debug options')
diff --git a/copyparty/httpcli.py b/copyparty/httpcli.py
index 22f0262f..b61680b4 100644
--- a/copyparty/httpcli.py
+++ b/copyparty/httpcli.py
@@ -2216,6 +2216,9 @@ class HttpCli(object):
         if "mth" in vn.flags:
             j2a["def_hcols"] = vn.flags["mth"].split(",")
 
+        if self.args.js_browser:
+            j2a["js"] = self.args.js_browser
+
         if self.args.css_browser:
             j2a["css"] = self.args.css_browser
 
diff --git a/copyparty/web/browser.html b/copyparty/web/browser.html
index d02d0c80..4570f5ef 100644
--- a/copyparty/web/browser.html
+++ b/copyparty/web/browser.html
@@ -141,6 +141,9 @@
 	<script src="/.cpr/util.js?_={{ ts }}"></script>
 	<script src="/.cpr/browser.js?_={{ ts }}"></script>
 	<script src="/.cpr/up2k.js?_={{ ts }}"></script>
+	{%- if js %}
+	<script src="{{ js }}?_={{ ts }}"></script>
+	{%- endif %}
 </body>
 
 </html>
diff --git a/tests/test_httpcli.py b/tests/test_httpcli.py
index d10bac66..75e2eae0 100644
--- a/tests/test_httpcli.py
+++ b/tests/test_httpcli.py
@@ -50,6 +50,7 @@ class Cfg(Namespace):
             hist=None,
             no_idx=None,
             no_hash=None,
+            js_browser=None,
             css_browser=None,
             **{k: False for k in "e2d e2ds e2dsa e2t e2ts e2tsr".split()}
         )
diff --git a/tests/test_vfs.py b/tests/test_vfs.py
index 73ebe3bb..7ddd728c 100644
--- a/tests/test_vfs.py
+++ b/tests/test_vfs.py
@@ -25,6 +25,7 @@ class Cfg(Namespace):
             "hist": None,
             "no_idx": None,
             "no_hash": None,
+            "js_browser": None,
             "css_browser": None,
             "no_voldump": True,
             "no_logues": False,