diff --git a/copyparty/web/md.js b/copyparty/web/md.js
index d8901a9a..0109d453 100644
--- a/copyparty/web/md.js
+++ b/copyparty/web/md.js
@@ -23,8 +23,7 @@ var dbg = function () { };
 
 // dodge browser issues
 (function () {
-    var ua = navigator.userAgent;
-    if (ua.indexOf(') Gecko/') !== -1 && /Linux| Mac /.exec(ua)) {
+    if (UA.indexOf(') Gecko/') !== -1 && /Linux| Mac /.exec(UA)) {
         // necessary on ff-68.7 at least
         var s = mknod('style');
         s.innerHTML = '@page { margin: .5in .6in .8in .6in; }';
diff --git a/copyparty/web/md2.js b/copyparty/web/md2.js
index c59fa056..6df62b13 100644
--- a/copyparty/web/md2.js
+++ b/copyparty/web/md2.js
@@ -450,7 +450,7 @@ function savechk_cb() {
 
 // firefox bug: initial selection offset isn't cleared properly through js
 var ff_clearsel = (function () {
-    if (navigator.userAgent.indexOf(') Gecko/') === -1)
+    if (UA.indexOf(') Gecko/') === -1)
         return function () { }
 
     return function () {
diff --git a/copyparty/web/svcs.js b/copyparty/web/svcs.js
index 505b16ac..7f251c35 100644
--- a/copyparty/web/svcs.js
+++ b/copyparty/web/svcs.js
@@ -1,9 +1,9 @@
 function QSA(x) {
     return document.querySelectorAll(x);
 }
-var LINUX = /Linux/.test(navigator.userAgent),
-    MACOS = /[^a-z]mac ?os/i.test(navigator.userAgent),
-    WINDOWS = /Windows/.test(navigator.userAgent);
+var LINUX = /Linux/.test(UA),
+    MACOS = /[^a-z]mac ?os/i.test(UA),
+    WINDOWS = /Windows/.test(UA);
 
 
 var oa = QSA('pre');
diff --git a/copyparty/web/up2k.js b/copyparty/web/up2k.js
index 107a06ec..c44e07a4 100644
--- a/copyparty/web/up2k.js
+++ b/copyparty/web/up2k.js
@@ -969,7 +969,7 @@ function up2k_init(subtle) {
             ud = function () { ebi('dir' + fdom_ctr).click(); };
 
         // too buggy on chrome <= 72
-        var m = / Chrome\/([0-9]+)\./.exec(navigator.userAgent);
+        var m = / Chrome\/([0-9]+)\./.exec(UA);
         if (m && parseInt(m[1]) < 73)
             return uf();
 
diff --git a/copyparty/web/util.js b/copyparty/web/util.js
index d53bc496..53a5d76d 100644
--- a/copyparty/web/util.js
+++ b/copyparty/web/util.js
@@ -31,12 +31,13 @@ var wah = '',
     MOBILE = TOUCH,
     CHROME = !!window.chrome,  // safari=false
     VCHROME = CHROME ? 1 : 0,
-    IE = /Trident\//.test(navigator.userAgent),
-    FIREFOX = ('netscape' in window) && / rv:/.test(navigator.userAgent),
-    IPHONE = TOUCH && /iPhone|iPad|iPod/i.test(navigator.userAgent),
-    LINUX = /Linux/.test(navigator.userAgent),
-    MACOS = /[^a-z]mac ?os/i.test(navigator.userAgent),
-    WINDOWS = /Windows/.test(navigator.userAgent);
+    UA = '' + navigator.userAgent,
+    IE = /Trident\//.test(UA),
+    FIREFOX = ('netscape' in window) && / rv:/.test(UA),
+    IPHONE = TOUCH && /iPhone|iPad|iPod/i.test(UA),
+    LINUX = /Linux/.test(UA),
+    MACOS = /[^a-z]mac ?os/i.test(UA),
+    WINDOWS = /Windows/.test(UA);
 
 if (!window.WebAssembly || !WebAssembly.Memory)
     window.WebAssembly = false;
@@ -196,7 +197,7 @@ function vis_exh(msg, url, lineNo, columnNo, error) {
         '<p style="font-size:1.3em;margin:0;line-height:2em">try to <a href="#" onclick="localStorage.clear();location.reload();">reset copyparty settings</a> if you are stuck here, or <a href="#" onclick="ignex();">ignore this</a> / <a href="#" onclick="ignex(true);">ignore all</a> / <a href="?b=u">basic</a></p>',
         '<p style="color:#fff">please send me a screenshot arigathanks gozaimuch: <a href="<ghi>" target="_blank">new github issue</a></p>',
         '<p class="b">' + esc(url + ' @' + lineNo + ':' + columnNo), '<br />' + esc(msg).replace(/\n/g, '<br />') + '</p>',
-        '<p><b>UA:</b> ' + esc(navigator.userAgent + '')
+        '<p><b>UA:</b> ' + esc(UA)
     ];
 
     try {