diff --git a/modules/graphical/sway/default.nix b/modules/graphical/sway/default.nix
index 4d964ab3..f914d934 100644
--- a/modules/graphical/sway/default.nix
+++ b/modules/graphical/sway/default.nix
@@ -35,6 +35,18 @@ in
 
     xdg.portal = {
       enable = true;
+      config.sway = {
+        # https://alex.dandrea.io/2024/07/20/fixing-idle-inhibitor-behaviour-in-firefox-with-wayland/
+        # Use xdg-desktop-portal-gtk for every portal interface...
+        default = "gtk";
+        # ... except for the ScreenCast, Screenshot and Secret
+        "org.freedesktop.impl.portal.ScreenCast" = "wlr";
+        "org.freedesktop.impl.portal.Screenshot" = "wlr";
+        # ignore inhibit bc gtk portal always returns as success,
+        # despite sway/the wlr portal not having an implementation,
+        # stopping firefox from using wayland idle-inhibit
+        "org.freedesktop.impl.portal.Inhibit" = "none";
+      };
       wlr = {
         enable = true;
         settings = {