old_contents: // need to test manually in devtools
  // $ browserify test-browser.js > tmp.js
  var isOnline = require('./browser');
  
  isOnline(function (err, online) {
  	console.log('online', online);
  });
  
new_contents: // need to test manually in devtools
  // $ browserify test-browser.js > tmp.js
  var isOnline = require('./browser');
  
  isOnline(function (online) {
  	console.log('online', online);
  });
  
subject: fix browser test