Good to see the Congress working together for a good cause.
Why is that a good cause, snowflake? Is Mueller in some sort of danger? Why are people like you so impossibly ignorant of everything you write? Firing Mueller wouldn't stop the investigation. How much will you still like Mueller if he comes to the conclusion there is nothing to the Russia probe? Besides, the bill is probably unconstitutional anyway. Congress cannot usurp presidential power, it is a little thing called Separation of Powers. You should read it.
Thye President does not have the power to fire a special prosecutor. Only the Justice Department can do that and only for very specific reasons.