I'm not the GP, but for me it was an issue while wanting FF open for regular use and debugging, and another to run for automated feature tests. It's been a few

I'm not the GP, but for me it was an issue while wanting FF open for regular use and debugging, and another to run for automated feature tests. It's been a few years since I've tried, so I might be forgetting the exact circumstance, but there was some issue like that.