From what I understand from the articles about this, it was found that different JavaScript code (without any delay added) was served in the HTTP response if Firefox was spoofed to look like the request came from Chrome, so it seems the issue only occurs on non-chrome browsers.
It's not Linux, but there's an open source project available where you can build your own engine ECU with an Arduino https://hackaday.io/project/4413-speeduino