Did they fix the horrible performance of Firefox based browsers? That was deal breaker for me. YouTube videos would lag and stutter for 1-2 seconds before playing. Smooth as butter on chrome based browsers. I don’t want to rely on chrome based browsers.
If the black screen is after the boot loader then it sounds like video driver issue. Try nomodeset kernel parameter or a different distribution.
If the black screen is before the boot loader you’re either not booting the installation media correctly or your installation media might be corrupted. Try redownloading the iso and reinstalling it in the installation media.
Firefox lost me with that new terms of service that lets them record everything you do and phone home. No thanks.