[firefox] Add speech synthesis

nixos/modules/apps/firefox/default.nix

@@ -1,16 +1,12 @@
 { inputs, lib, config, pkgs, ... }:
 
 {
-  home-manager.users.tdpeuter = {
-    home.packages = with pkgs; [
-      speechd
-    ];
-
-    programs.firefox = {
+  home-manager.users.tdpeuter.programs.firefox = {
     enable = true;
     package = pkgs.firefox.override {
       cfg = {
         enableTridactylNative = true;
+        speechSynthesisSupport = true;
       };
       extraPolicies = {
         DisableFirefoxStudies = true;
@@ -25,7 +21,9 @@
         default = "DuckDuckGo";
         force = true;
         engines = {
+          "Bing".metaData.hidden = true;
           "eBay".metaData.hidden = true;
+
           "Nix Packages" = {
             urls = [{
               template = "https://search.nixos.org/packages";
@@ -42,6 +40,5 @@
       };
     };
   };
-  };
 }