There's always more to be said, but in the meantime you may find some answers about where each of the Canadian colonies stood by 1775-6 in this thread.

Quebec wasn't fond of its British rulers, but the French had lived in peace under British rule for some 15 years and had legal protections for their religion, language and property. Protestant New England was virulently anti-Catholic and found this generous treatment to be intolerable. Most in Quebec didn't trust the American rebels at all, despite some local agitators.

Both the Catholic Church and the colony's elite encouraged the French to remain faithful to the Crown, while portraying the Revolution as the path to anarchy. Benedict Arnold's failed attack on Quebec only encouraged this perception among the populace.

Nova Scotia could have been the 14th colony, but it was sparsely settled and Patriot support was not as deep or organized effectively. Most settlers there were also from New England, but they were largely indifferent to rebellion and wanted to be left in peace. They were even called the "neutral Yankees". American privateering raids on the coast would turn this indifference to opposition to any revolution. The colony's military, political and merchant elites who controlled the assembly were mostly Loyalist and they formally voted in favour of the Crown. Halifax was also the North American station for the Royal Navy.

Washington was unenthusiastic about the chances of Nova Scotia rising up against the Crown, and NS Patriots received a lukewarm response to their requests for aid. Washington astutely gauged that there was insufficient local support, and that any attempt to send Continental troops there would be seen not as a force of liberation -- but as a hostile invasion.