Firocoxib has never been on the market for people or studied in humans.
Celecoxib is still on the market.
Vioxx, rofecoxib, was pulled from the market after a risk of heart attack and stroke was uncovered.
These are not the same drug, but are in the same class of COX-2 selective NSAIDS. Drugs in the same class are similar in action but are NOT the same drug.