x-default-browser/lib/detect-mac.js

Detect default web browser of the current user, cross-platform (Win/Lin/Mac)

var defaultBrowserMac = require("default-browser-id");

var exec = require("child_process").exec;

module.exports = function (callback) {
  defaultBrowserMac()
    .then(function (browserId) {
      var value = browserId;
      var valueLC = value.toLowerCase();

      /*
            Safari         com.apple.Safari
            Google Chrome  com.google.chrome
            Opera          com.operasoftware.Opera
            Firefox        org.mozilla.firefox
         */
      var out = {
        isIE: false,
        isSafari: valueLC.indexOf("safari") > -1,
        isFirefox: valueLC.indexOf("firefox") > -1,
        isChrome: valueLC.indexOf("google") > -1,
        isChromium: valueLC.indexOf("chromium") > -1, // untested
        isOpera: valueLC.indexOf("opera") > -1,
        identity: value,
      };
      out.isBlink = out.isChrome || out.isChromium || out.isOpera;
      out.isWebkit = out.isSafari || out.isBlink;
      out.commonName = require("./common-name")(out);

      callback(null, out);
    })
    .catch(function (err) {
      if (err) {
        callback("Unable to retrieve default browser: " + err);
      }
    });
};