fix enter ifream bug

manifest.json

@@ -36,5 +36,19 @@
         "<all_urls>"
       ]
     }
-  ]
+  ],
+  "commands": {
+    "execute-alt-r": {
+      "suggested_key": {
+        "default": "Alt+R"
+      },
+      "description": "Execute Alt+R shortcut"
+    },
+    "execute-ctrl-c": {
+      "suggested_key": {
+        "default": "Ctrl+C"
+      },
+      "description": "Execute Ctrl+C shortcut"
+    }
+  }
 }