The plugin seems to be using UpdateSites to add the url from which to download the drivers, but I cannot find anywhere in the plugin source code where this is done, nor any other place the webdriver url is defined. This does not seem like the right usage of UpdateSites to me, and also means that the driver version downloaded by the plugin is stuck on version 2.9, whereas the latest version is 2.21. Version 2.9 is too outdated and causes major errors in test cases.