What led to the Quebec act, and what were the effects of its passage

The Quebec Act came about because British were worried that the French Canadians would support the American Revolution and since they had imposed some legislative acts on the Quebecois, which they did not like, they felt they should change these a little and gain support from the French-speaking population. The Quebecois were now able to use their own land systems, have a different government style to some extent, to be able to more freely practice Catholicism and gained more territory.