Is it a question merely of breastfeeding; or is the issue more one of a woman's being bare breasted in public? In Ontario, it is legal for women to go topless in public, altho' hardly any choose to do so.
Women's topless court victory 20 years later - Politics - CBC News
It's still illegal for women to go topless in the rest of Canada; but that is probably because nobody has challenged provincial and municipal laws. I have no doubt that the Supreme Court would, on a challenge, strike down any law prohibiting a woman's right to go topless in public if she so wishes. Such laws are in clear violation of an individual's rights under the Canadian Charter of Rights and Freedoms.