Add FirefoxDriver configuration to allow automatic basic auth with http://user:pass@host.tld

[paulwellnerbou]

This configuration allows you to use basic authentification with, for example

baseUrl = http://user:password@host.tld

Not sure, if you want this to be integrated in your master branch. But if not, this pull request may serve as documentation and example on how to achieve this.

[erdi]

Hi @paulwellnerbou,

Thanks for your contribution but as you have anticipated I will not be merging this into master. Your changes, while probably valuable for your particular use case, have not much to do with this example and do not influence the result of running the tests that constitute this project. While it might feel useful for you, showing all possible configuration options will unnecessarily bloat this project and make it harder to understand for newcomers. I would like to keep it as lean as possible and not include a single line of code that is not necessary to get the tests passing.

Thanks for your understanding.