diff --git a/firefox.nix b/firefox.nix
index 8d4f0e6..8ced54f 100644
--- a/firefox.nix
+++ b/firefox.nix
@@ -49,6 +49,7 @@ in
       settings = {
         "browser.startup.homepage" = "${startpage}";
         "toolkit.legacyUserProfileCustomizations.stylesheets" = true;
+        "browser.backspace_action" = 0;
       };
       userChrome = builtins.readFile "${firefox-csshacks}/chrome/autohide_toolbox.css";
     };