I am trying to open all html in a folder at one time in different tabs using gulp. I tried using gulp browser-sync plugin to do it. But somehow I am not sure how to do it. Below is the script I tried and it din't work.

gulp.task('serve', ['styles', 'html', 'modernizr', 'images', 'scripts', 'jshint', 'size', 'zipper'], function() {
    browserSync.init({
        server: {
            baseDir: 'app',
             files: [
                 './app/*.html'
            ]
        },
    });
});