diff --git a/copyparty/web/browser.css b/copyparty/web/browser.css
index 4ad9e57b..6e688190 100644
--- a/copyparty/web/browser.css
+++ b/copyparty/web/browser.css
@@ -629,6 +629,9 @@ input.eq_gain {
 	margin-top: .5em;
 	padding: 1.3em .3em;
 }
+#ico1 {
+	cursor: pointer;
+}
 
 
 
@@ -1076,7 +1079,8 @@ a.btn,
 #rui label,
 #modal-ok,
 #modal-ng,
-#ops {
+#ops,
+#ico1 {
 	-webkit-user-select: none;
 	-moz-user-select: none;
 	-ms-user-select: none;
diff --git a/copyparty/web/browser.js b/copyparty/web/browser.js
index c3392e37..6e793c34 100644
--- a/copyparty/web/browser.js
+++ b/copyparty/web/browser.js
@@ -168,6 +168,15 @@ ebi('op_cfg').innerHTML = (
 	'		</td>\n' +
 	'	</div>\n' +
 	'</div>\n' +
+	'<div>\n' +
+	'	<h3>favicon <span id="ico1">🎉</span></h3>\n' +
+	'	<div>\n' +
+	'		<input type="text" id="icot" style="width:1.3em" value="" tt="favicon text (blank and refresh to disable)" />' +
+	'		<input type="text" id="icof" style="width:2em" value="" tt="foreground color" />' +
+	'		<input type="text" id="icob" style="width:2em" value="" tt="background color" />' +
+	'		</td>\n' +
+	'	</div>\n' +
+	'</div>\n' +
 	'<div><h3>key notation</h3><div id="key_notation"></div></div>\n' +
 	'<div class="fill"><h3>hidden columns</h3><div id="hcols"></div></div>'
 );
diff --git a/copyparty/web/up2k.js b/copyparty/web/up2k.js
index cdcd771d..0f5f3c85 100644
--- a/copyparty/web/up2k.js
+++ b/copyparty/web/up2k.js
@@ -2012,6 +2012,15 @@ function warn_uploader_busy(e) {
 
 
 tt.init();
+favico.init();
+ebi('ico1').onclick = function () {
+    var a = favico.txt == this.textContent;
+    swrite('icot', a ? 'c' : this.textContent);
+    swrite('icof', a ? null : '000');
+    swrite('icob', a ? null : '');
+    favico.init();
+};
+
 
 if (QS('#op_up2k.act'))
     goto_up2k();
diff --git a/copyparty/web/util.js b/copyparty/web/util.js
index a5c927c8..6fb3512f 100644
--- a/copyparty/web/util.js
+++ b/copyparty/web/util.js
@@ -621,9 +621,9 @@ function icfg_get(name, defval) {
 }
 
 function fcfg_get(name, defval) {
-    var o = ebi(name);
+    var o = ebi(name),
+        val = parseFloat(sread(name));
 
-    var val = parseFloat(sread(name));
     if (isNaN(val))
         return parseFloat(o ? o.value : defval);
 
@@ -633,6 +633,19 @@ function fcfg_get(name, defval) {
     return val;
 }
 
+function scfg_get(name, defval) {
+    var o = ebi(name),
+        val = sread(name);
+
+    if (val === null)
+        val = defval;
+
+    if (o)
+        o.value = val;
+
+    return val;
+}
+
 function bcfg_get(name, defval) {
     var o = ebi(name);
     if (!o)
@@ -684,6 +697,21 @@ function bcfg_bind(obj, oname, cname, defval, cb, un_ev) {
     return v;
 }
 
+function scfg_bind(obj, oname, cname, defval, cb) {
+    var v = scfg_get(cname, defval),
+        el = ebi(cname);
+
+    obj[oname] = v;
+    if (el)
+        el.oninput = function (e) {
+            swrite(cname, obj[oname] = this.value);
+            if (cb)
+                cb(obj[oname]);
+        };
+
+    return v;
+}
+
 
 function hist_push(url) {
     console.log("h-push " + url);
@@ -849,16 +877,7 @@ var tt = (function () {
     }
 
     r.init = function () {
-        var ttb = ebi('tooltips');
-        if (ttb) {
-            ttb.onclick = function (e) {
-                ev(e);
-                r.en = !r.en;
-                bcfg_set('tooltips', r.en);
-                r.init();
-            };
-            r.en = bcfg_get('tooltips', true)
-        }
+        bcfg_bind(r, 'en', 'tooltips', r.en, r.init);
         r.att(document);
     };
 
@@ -1181,3 +1200,54 @@ function repl(e) {
 }
 if (ebi('repl'))
     ebi('repl').onclick = repl;
+
+
+var favico = (function () {
+    var r = {};
+    r.en = true;
+
+    function gx(txt) {
+        return (
+            '<?xml version="1.0" encoding="UTF-8"?>\n' +
+            '<svg version="1.1" viewBox="0 0 64 64" xmlns="http://www.w3.org/2000/svg"><g>\n' +
+            (r.bg ? '<rect width="100%" height="100%" rx="16" fill="#' + r.bg + '" />\n' : '') +
+            '<text x="50%" y="55%" dominant-baseline="middle" text-anchor="middle"' +
+            ' font-family="sans-serif" font-weight="bold" font-size="64px"' +
+            ' fill="#' + r.fg + '">' + txt + '</text></g></svg>'
+        );
+    }
+
+    r.upd = function () {
+        var i = QS('link[rel="icon"]'), b64;
+        if (!r.txt)
+            return;
+
+        try {
+            b64 = btoa(gx(r.txt));
+        }
+        catch (ex) {
+            b64 = encodeURIComponent(r.txt).replace(/%([0-9A-F]{2})/g,
+                function x(m, v) { return String.fromCharCode('0x' + v); });
+
+            b64 = btoa(gx(unescape(encodeURIComponent(r.txt))));
+        }
+
+        if (!i) {
+            i = mknod('link');
+            i.rel = 'icon';
+            document.head.appendChild(i);
+        }
+        i.href = 'data:image/svg+xml;base64,' + b64;
+    };
+
+    r.init = function () {
+        clearTimeout(r.to);
+        scfg_bind(r, 'txt', 'icot', '', r.upd);
+        scfg_bind(r, 'fg', 'icof', 'fc5', r.upd);
+        scfg_bind(r, 'bg', 'icob', '333', r.upd);
+        r.upd();
+    };
+
+    r.to = setTimeout(r.init, 100);
+    return r;
+})();