Ghostlab does not include any browsers (i.e. Safari, Chrome, etc.). However, Ghostlab is able to launch any browser that is installed on your system – either directly, or inside a Virtual Machine.
When you start Ghostlab, it will create a list of installed browsers and then make them available in the “Launch in browser” menu while the site is running. Also, any browser installed on your computer can be part of the Ghostlab Workspace.