The British had only just enacted the Quebec Act in 1774 which started to give the Quebecois more rights. Before the act the British policy was to try to make the Quebecois assimilate into British culture by not giving any rights to the largely Catholic Quebecois unless they denounced their...
What if Quebec begins a revolution against Britain at the same time as the thirteen colonies. 1775
With a unified revolution Quebec and the colonies plan to take away all British lands in Eastern North America.
This would only leave Britain with Rupert's Land any anything else to the west...