Enable fxCast on Firefox

common/linux-desktop.nix

@@ -15,4 +15,22 @@
   };
 
   services.gnome.gnome-keyring.enable = true;
+
+  programs.firefox = {
+    enable = true;
+    nativeMessagingHosts.fxCast = true;
+  };
+
+  services.avahi = {
+    enable = true;
+    nssmdns = true;
+    publish = {
+      enable = true;
+      addresses = true;
+      domain = true;
+      hinfo = true;
+      userServices = true;
+      workstation = true;
+    };
+  };
 }