Napoleon briefly toyed with the idea of reforming a French colonial empire by regaining Saint Domingue aka Haiti, while France reacquired Louisiana from its lukewarm ally Spain in 1800. (Spain had gained Louisiana in the aftermath of the Seven Years War in 1763.) But the prolonged Haitian Revolution, and the growing cost of Napoleon's European campaigns soon soured him on the idea. He would sell Louisiana to the US for $15 million.

The British Navy's decisive victory in 1805 at Trafalgar against a combined Franco-Spanish fleet ensured that the French navy would be hard-pressed to mount any kind of invasion in England or anywhere else.

The French in Canada were not identical to the French in France beyond the obvious linguistic and cultural similarities. When New France fell in 1759, France was still a monarchy and the British and Catholic hierarchy promoted loyalty to the British Crown as the best way for French Canadians to preserve their culture and maintain social order. They weren't fond of their new British masters, but they had guaranteed rights under British law and lived in peace under their rule.

Under the peace treaty, France had also agreed to give up Canada in exchange for Guadaloupe -- its sugar trade was seen as more valuable. So within Quebec, there was a collective sense of regret and even resentment that the mother country had abandoned them to an uncertain fate.

The republicanism of America and the French Revolution were portrayed as the path to anarchy. Benedict Arnold's failed 1775 invasion of Quebec only convinced the majority of French Canadians that rebellion was not in their interests. When the French Revolution erupted, many French Canadians actually sympathized with Louis XVI, believing that he had been led astray by his ministers. They saw the beheading of the king by the revolutionaries and their anti-clerical policies as examples of the social unrest they wished to avoid.

Napoleon didn't seriously entertain the idea of retaking Canada, as his immediate concerns were in Europe. And the French in Quebec had no real desire to return to a republican France, when they had freedoms and protections as British subjects.