Just seemingly out of the blue I started getting Firefox captive portal warnings. Most websites load normally but if it's a new site i.e. one I ahven't visited in a while I get the "you must log into this netrwork before you an access the internet" message. I am and have only and always been on my home wifi with this computer, it's a laptop but has never been out of my house. Forefox seems slow lately and I keep getting this message. Other browsers work fine by the way.