No he can't dipshit. Do you ever get tired of being wrong?
Opinion | President Trump Can’t Just Fire Robert Mueller
Notice where it says "opinion."
Yes it is an Opinion piece that quotes the regulations that makes it so that Trump can't legally do it. But I once again overestimated your ability to read and comprehend knowledge.
https://www.gpo.gov/fdsys/pkg/CFR-2001-title28-vol2/pdf/CFR-2001-title28-vol2-part600.pdf
"(d) The Special Counsel may be disciplined or removed from office only by the personal action of the Attorney General. The Attorney General may remove a Special Counsel for misconduct, dereliction of duty, incapacity, conflict of interest, or for other good cause, including violation of Departmental policies. The Attorney General shall inform the Special Counsel in writing of the specific reason for his or her removal."
Since Sessions recused himself, that means Rosenstein the acting Deputy AG is the only person that can fire Mueller.
So yes... you are wrong. As always.