recently there have been a lot of discussions about Chrome's dominance on the Web leading to many websites being broken for alternative browsers.

I think one of the reasons for this is that browser automation is hard and manual testing is often limited to the browser developers themselves use.

I've distilled my best practices for browser test automation into the following project and hope it helps other developers to test their projects with more browsers:

https://github.com/blueimp/wdio

It's a Docker setup for WebdriverIO with automatic screenshots, image diffing and screen recording support for containerized versions of Chrome and Firefox.

It also includes Webdriver configurations to test an app running in Docker with Safari Desktop, Safari Mobile and Chrome Mobile via Appium and Internet Explorer and Microsoft Edge in a Windows 10 virtual machine.