$ gulp browser
[11:41:22] Using gulpfile xxx/gulpfile.js
[11:41:23] Task 'browser' is not in your gulpfile
[11:41:23] Please check the documentation for proper gulpfile formatting
$ gulp -v
[11:44:28] CLI version 3.8.11
[11:44:28] Local version 3.9.1
On branch
master-new