How predominant was slavery in Ireland before it was abolished by the British empire?

by Goldwood

How common were African slaves in Ireland before the practice was abolished by Britain?

The_Manchurian

As a related sub-question, when was slavery banned in Ireland? In the late 18th century like in Britain, or as part of the early 19th century British Empire ban? Or in 1801 when Ireland was absorbed into the UK? (Which asks the less-related question: when Ireland was absorbed into the UK, did it keep its own laws or adopt English law?)