i Register
In some senses, firster is marked as obsolete. Watch for register when choosing this word.
noun
A person who advocates the primacy of the named entity (who puts it first).
In recent years, “knowledge-first” epistemologists have worried that any analysis of knowledge fails to recognize that knowledge is more fundamental than epistemic analysis. Knowledge, the knowledge-firster contends, should be taken as an epistemic primitive.
adj
Earlier, former.