diff --git a/hostconfig/thinkpad-nixos/hm.nix b/hostconfig/thinkpad-nixos/hm.nix
index 862a686..1c2eb25 100644
--- a/hostconfig/thinkpad-nixos/hm.nix
+++ b/hostconfig/thinkpad-nixos/hm.nix
@@ -122,10 +122,12 @@ in {
     };
     extraConfig = {
       general.unsafe-accounts-conf = true;
+
       ui = {
         mouse-enabled = true;
         threading-enabled = true;
       };
+
       filters = {
         "text/plain" = "colorize";
         "text/calendar" = "calendar";
@@ -134,6 +136,10 @@ in {
         "text/html" = "html | colorize";
         "subject,~^\\[PATCH" = "delta";
       };
+
+      openers = {
+        "x-scheme-handler/http*" = "firefox";
+      };
     };
     extraBinds = {
       global = {