diff --git a/fix-firefox.nix b/fix-firefox.nix
index a9a0ea1..f65c102 100644
--- a/fix-firefox.nix
+++ b/fix-firefox.nix
@@ -7,12 +7,20 @@
     firefox-unwrapped = stdenv.mkDerivation {
       inherit (firefox-unwrapped) name version;
 
+      nativeBuildInputs = [ fastjar ];
+
       buildCommand = ''
         mkdir -p $out
         cp -ra ${firefox-unwrapped}/. $out/.
         chmod +w -R $out
         sed -i "s|${firefox-unwrapped}|$out|g" $out/bin/firefox
-        sed -i 's/reserved="true"/               /g' $out/lib/firefox/browser/omni.ja
+
+        j=$out/lib/firefox/browser/omni.ja
+        # f=chrome/browser/content/browser/browser.xhtml
+        f=localization/en-US/browser/browserSets.ftl
+        fastjar xf $j $f
+        patch $f <${./fix-firefox.patch}
+        fastjar uf $j $f
       '';
 
       inherit (firefox-unwrapped) meta;
diff --git a/fix-firefox.patch b/fix-firefox.patch
new file mode 100644
index 0000000..9a69fd2
--- /dev/null
+++ b/fix-firefox.patch
@@ -0,0 +1,20 @@
+--- localization/en-US/browser/browserSets.ftl~	2020-08-31 11:28:51.148881026 +0200
++++ localization/en-US/browser/browserSets.ftl	2020-08-31 11:35:37.659977936 +0200
+@@ -9,7 +9,7 @@
+     .label = Zoom
+ 
+ window-new-shortcut =
+-    .key = N
++    .keycode = VK_F19
+ 
+ window-minimize-shortcut =
+     .key = M
+@@ -185,7 +185,7 @@
+ ## global menu.
+ 
+ quit-app-shortcut =
+-    .key = Q
++    .keycode = VK_F20
+ 
+ help-shortcut =
+     .key = ?