Disable some stuff in firefox.

nix/configuration/roles/firefox/default.nix

@@ -79,6 +79,20 @@
       policies = {
         DisableTelemetry = true;
         DisplayBookmarksToolbar = "newtab";
+        DisableFirefoxStudies = true;
+        FirefoxHome = {
+          SponsoredStories = false;
+          SponsoredTopSites = false;
+          Stories = false;
+        };
+        GenerativeAI = {
+          Enabled = false;
+        };
+        SearchEngines = {
+          Remove = [
+            "Perplexity"
+          ];
+        };
 
         # Check about:support for extension/add-on ID strings.
         # Valid strings for installation_mode are "allowed", "blocked",