browserify_uglifyify_gulp.js

gulp.task('browserify', function () {
  return browserify('./src/js/app.js', {
      debug: true,                      // with source maps
      transform: ['brfs', 'uglifyify']  // include file system and uglify before bundle
    })
    .bundle()
    .pipe(source('app.js'))             // Pass desired output filename to vinyl-source-stream
    .pipe(gulp.dest('./assets/js/'));   // Start piping stream to tasks!
});

Uglifyify doesn't seem to be working. The final app.js is totally un-minified/uglifyed.