Fittingly, for this kind of mysterious creatures, very little is known about firbolgs. They originated in Irish mythology as founding settlers and before D&D editions ended up somewhat faithful to this, portraying firbolgs as powerful Celtic warriors. This is a significantly cry although, from the firbolgs of 5E. Notify es-Safi, https://deanewohy.blogs100.com/28209144/5-tips-about-goblins-dnd-5e-you-can-use-today