Fittingly, for these kinds of mysterious creatures, little or no is known about firbolgs. They originated in Irish mythology as founding settlers and before D&D editions have been somewhat faithful to this, portraying firbolgs as powerful Celtic warriors. It is a far cry even though, from the firbolgs of 5E. https://dragonborn-monk47802.blogdomago.com/27256977/5-tips-about-fighter-quick-build-you-can-use-today