There's always more to be said, but in the meantime you may find some answers in a previous post of mine about slavery in Canada and its eventual abolition. u/enygma9753.

There were black slaves in Canada, but much fewer. It did not have a plantation economy and did not require a mass importation of slave labour.

Canada's colonial economy was driven by its resources: furs, timber, fish etc. since the time of New France and had often relied more heavily on complex trading relationships/alliances with the native peoples. The black slaves that did exist were brought indirectly from the Thirteen Colonies. They mostly worked as domestic servants, artisans, farm hands or pioneers clearing the land. There would only be a greater influx of black slaves after the American Revolution, when Loyalist exiles brought their slaves with them to Canada.

Many would win their freedom during the American Revolution (and again during the War of 1812) when they were enticed to fight for Britain with the promise of freedom from slavery. Those who took up arms for the Crown were rewarded with land grants and/or monetary compensation, but these tended to be inferior to those given to whites.

Slavery would be banned in the British Empire with the Slavery Abolition Act in 1833. (Slavery in the US would only end decades later during the US Civil War with the Emancipation Proclamation in 1863.)

The link above also outlines its abolition in Canada and the precarious decades of the Underground Railroad, which helped fugitive American slaves to escape north to free states and Canada.