--- a/firefox-kde.patch	Wed Mar 17 12:24:14 2021 +0100
+++ b/firefox-kde.patch	Sat Mar 27 21:45:50 2021 +0100
@@ -3,7 +3,7 @@
 # Date 1559300151 -7200
 #      Fri May 31 12:55:51 2019 +0200
 # Node ID 54d41b0033b8d649d842a1f862c6fed8b9874dec
-# Parent  8310cc1a162e9dd066a20f6a3bbd271993b67fc6
+# Parent  856ef9c699423b1cd35e4df8745e78c409c8dbae
 How to apply this patch:
 1. Import and apply it
 2. cp browser/base/content/browser.xul browser/base/content/browser-kde.xul
@@ -14,7 +14,7 @@
 diff --git a/browser/components/preferences/main.js b/browser/components/preferences/main.js
 --- a/browser/components/preferences/main.js
 +++ b/browser/components/preferences/main.js
-@@ -347,16 +347,23 @@ var gMainPane = {
+@@ -338,16 +338,23 @@ var gMainPane = {
          }, backoffTimes[this._backoffIndex + 1 < backoffTimes.length ? this._backoffIndex++ : backoffTimes.length - 1]);
        };
  
@@ -38,7 +38,7 @@
      );
      let performanceSettingsUrl =
        Services.urlFormatter.formatURLPref("app.support.baseURL") +
-@@ -1326,16 +1333,27 @@ var gMainPane = {
+@@ -1313,16 +1320,27 @@ var gMainPane = {
        this._backoffIndex = 0;
  
        let shellSvc = getShellService();
@@ -63,9 +63,9 @@
          return;
        }
  
-       let selectedIndex = shellSvc.isDefaultBrowser(false, true) ? 1 : 0;
-       document.getElementById("setDefaultPane").selectedIndex = selectedIndex;
-     }
+       let isDefault = shellSvc.isDefaultBrowser(false, true);
+       let setDefaultPane = document.getElementById("setDefaultPane");
+       setDefaultPane.classList.toggle("is-default", isDefault);
 diff --git a/browser/components/shell/moz.build b/browser/components/shell/moz.build
 --- a/browser/components/shell/moz.build
 +++ b/browser/components/shell/moz.build