[
  {
    "browserName": "internet explorer",
    "platform":    "Windows 8.1",
    "version":     "11"
  },
  {
    "browserName": "internet explorer",
    "platform":    "Windows 7",
    "version":     "10"
  },

  {
    "browserName": "chrome",
    "platform":    "OS X 10.10",
    "version":     "dev"
  },
  {
    "browserName": "chrome",
    "platform":    "Windows 8.1",
    "version":     "beta"
  },
  {
    "browserName": "chrome",
    "platform":    "Linux",
    "version":     ""
  },

  {
    "browserName": "firefox",
    "platform":    "Windows 8.1",
    "version":     ""
  },
  {
    "browserName": "firefox",
    "platform":    "Linux",
    "version":     "beta"
  },

  {
    "browserName": "safari",
    "platform":    "OS X 10.10",
    "version":     "8"
  },
  {
    "browserName": "safari",
    "platform":    "OS X 10.9",
    "version":     "7"
  }
]

[
  {
    "browserName": "internet explorer",
    "platform":    "Windows 8.1",
    "version":     "11"
  },
  {
    "browserName": "internet explorer",
    "platform":    "Windows 7",
    "version":     "10"
  },

  {
    "browserName": "safari",
    "platform":    "OS X 10.10",
    "version":     "8"
  },
  {
    "browserName": "safari",
    "platform":    "OS X 10.9",
    "version":     "7"
  },

  {
    "browserName": "chrome",
    "platform":    "Linux",
    "version":     "dev"
  },
  {
    "browserName": "chrome",
    "platform":    "Linux",
    "version":     "beta"
  },
  {
    "browserName": "chrome",
    "platform":    "Linux",
    "version":     ""
  },

  {
    "browserName": "firefox",
    "platform":    "Linux",
    "version":     "dev"
  },
  {
    "browserName": "firefox",
    "platform":    "Linux",
    "version":     "beta"
  },
  {
    "browserName": "firefox",
    "platform":    "Linux",
    "version":     ""
  }
]

Add firefox dev, and make chrome and firefox use linux hosts
Add firefox dev, and make chrome and firefox use linux hosts

Linux hosts are much faster at booting chrome, and in the case of dev, over 40
seconds faster.
