False. Please read St. Jerome's Against Rufinus in which he states:
"What sin have I committed if I followed the judgment of the churches? But he who brings charges against me for relating the objections that the Hebrews are wont to raise against the Story of Susanna, the Song of the Three Children, and the story of Bel and the Dragon, which are not found in the Hebrew volume, proves that he is just a foolish sycophant. For I was not relating my own personal views, but rather the remarks that they [the Jews] are wont to make against us."
From “JustforCAtholics.org”
Question: St Jerome was persuaded, against his original inclination, to include the deuterocanonicals in his Vulgate edition of the Scriptures. What are your comments?
Answer: True, yet he classed the Apocrypha in a separated category. He differentiated between the canonical books and ecclesiastical books, which he did not recognize as authoritative Scripture. This is admitted by the modern Catholic church:
“St. Jerome distinguished between canonical books and ecclesiastical books. The latter he judged were circulated by the Church as good spiritual reading but were not recognized as authoritative Scripture. The situation remained unclear in the ensuing centuries...For example, John of Damascus, Gregory the Great, Walafrid, Nicolas of Lyra and Tostado continued to doubt the canonicity of the deuterocanonical books. According to Catholic doctrine, the proximate criterion of the biblical canon is the infallible decision of the Church. This decision was not given until rather late in the history of the Church at the Council of Trent. The Council of Trent definitively settled the matter of the Old Testament Canon. That this had not been done previously is apparent from the uncertainty that persisted up to the time of Trent” (The New Catholic Encyclopedia, The Canon).
The important part is the ‘obedience to the magisterium’, that our protestant friends seem so loathe to admit. ;)