diff --git a/src/js/controller/LayersListController.js b/src/js/controller/LayersListController.js
index 7df48d0a..590e911a 100644
--- a/src/js/controller/LayersListController.js
+++ b/src/js/controller/LayersListController.js
@@ -61,6 +61,8 @@
     var button = document.querySelector('.layers-button[data-action="' + buttonAction + '"]');
     if (isDisabled) {
       button.setAttribute('disabled', 'disabled');
+      // Disabled/focused buttons consume key events on Firefox, so make sure to blur.
+      button.blur();
     } else {
       button.removeAttribute('disabled');
     }