1. There was not much opposition to slavery in France during 18th century.
There had been a long discussion in the National Assembly that the basic rights of citizens should be given to the French people and the people living in their colony or not. But due to the fear of opposition by the traders engaged in slave trade, National Assembly did not pass any law. ’
2. It was finally the Convention which in 1794 made a law to free all slaves in the French colonies. But it was a short term measure as ten years later, Napoleon re-introduced slavery. Plantation owners were given freedom to make negroes as slaves in pursuation of their economic interests.
3. Finally slavery was abolished in French Colonies in 1848 A.D.