message: Test FireFox / Chrome on Mac
  Looks like using Linux platform results in old FireFox version.
diff: @@ -24,7 +24,7 @@ module.exports = function(config) {
  base: "SauceLabs",
  browserName: "chrome",
  version: "latest",
  - platform: "Linux"
  + platform: "OS X 10.11"
  },
  SL_InternetExplorer: {
  base: "SauceLabs",
  @@ -42,7 +42,7 @@ module.exports = function(config) {
  base: "SauceLabs",
  browserName: "firefox",
  version: "latest",
  - platform: "Linux"
  + platform: "OS X 10.11"
  },
  SL_SAFARI10: {
  base: "SauceLabs",
  