Firefox prevents the typing (~) key from working on the typing.com website, and unfortunately I can't go through the lessons on the website because of this problem. I tested in other browsers if the problem persisted and it appears that only firefox exhibits this behavior. I also tested starting the browser by the way that disables the extensions and I continue the key without working. Please, does anyone know any solution to this problem? I loved the Firefox browser and I don't want to leave it just because of that.