Yahoo mail is the only site on my browser that doesn't work. It opens and loads and you can open an email but you can't do anything with it. You can't look at attachments, delete, move, star, or anything. I've reloaded yahoo, created a new password and signed back in, closed Firefox and opened back up, restarted my laptop and opened back up, cleared cache - NOTHING WORKS. It works just fine on Chrome and my phone. I noticed that yahoo mail url is the only one that has a cross site cookie symbol. But when I take it out, it still doesn't work. I am beyond annoyed.