diff --git a/schema/plugin.json b/schema/plugin.json
index b46ba41..c304f09 100644
--- a/schema/plugin.json
+++ b/schema/plugin.json
@@ -138,7 +138,7 @@
     {
       "selector": ".jp-NotebookPanel[data-jp-vim-mode='true'][data-jp-vim-shift-esc-override-browser='true'] .jp-Notebook.jp-mod-commandMode",
       "keys": ["Shift Escape"],
-      "command": ""
+      "command": "vim:no-action"
     },
     {
       "selector": ".jp-NotebookPanel[data-jp-vim-mode='true'] .jp-Notebook:focus",
diff --git a/src/labCommands.ts b/src/labCommands.ts
index e06194b..2de2a1f 100644
--- a/src/labCommands.ts
+++ b/src/labCommands.ts
@@ -166,7 +166,7 @@ export function addNotebookCommands(
       isEnabled
     }),
     commands.addCommand('vim:leave-current-mode', {
-      label: 'Move Insert to Normal to Jupyter Command Mode"',
+      label: 'Move Insert to Normal to Jupyter Command Mode',
       execute: args => {
         const current = getCurrent(args);
 
@@ -284,6 +284,14 @@ export function addNotebookCommands(
         }
       },
       isEnabled
+    }),
+    commands.addCommand('vim:no-action', {
+      label: 'Prevent Default Browser Action',
+      caption:
+        'Prevent default action for some keybindings (defined in the settings); for example Firefox binds Shift + Esc to its Process Manager which conflicts with the expected action in the vim mode.',
+      execute: args => {
+        // no-op
+      }
     })
   ];
   return addedCommands;