No doubt a hardware problem, but that doesn't mean your FF is innocent. Usually a DC is caused by internet failure BUT like with all programs it can fail if it is overwhelmed by input.

You can try several things: lowering your graphics, upgrading hardware and software, reinstalling, closing other programs while playing, buying a portable wifi buffing tool (idk what they're called but it's a thing forrealsies), even cleaning your hard drive might help.