diff --git a/gui-software.nix b/gui-software.nix
index ecf1a74..e51453c 100644
--- a/gui-software.nix
+++ b/gui-software.nix
@@ -49,6 +49,12 @@
     "application/xhtml+xml" = "firefox.desktop";
     "application/x-extension-xhtml" = "firefox.desktop";
     "application/x-extension-xht" = "firefox.desktop";
+    "image/webp" = "nsxiv.desktop";
+    "image/jpeg" = "nsxiv.desktop";
+    "image/png" = "nsxiv.desktop";
+    "image/gif" = "nsxiv.desktop";
+    "image/bmp" = "nsxiv.desktop";
+    "image/svg+xml" = "nsxiv.desktop";
   };
 
   home.sessionVariables = { BROWSER = "firefox"; };