So you are looking to run Selenium tests on multiple browsers and want to find out more information on how to run these tests.
Since selenium is open-source you can just download and start your very own Selenium Grid. A Selenium Grid is a group of Selenium nodes that have one or multiple browsers to their disposal.
You could create your own virtual machines (VMs), each packed with the browsers you want to test on, set up a Selenium Grid and point your tests to the grid. However, that will require a lot of time and effort. Here is a list of things you would need to do
