I logged on to Firefox and searched for information on my Apple i-phone SE 2020. I received information titled "i-phone User Guide" It is about 20 pages. Now I can't get rid of it. It shows up every time I try to log on Firefox and I can't go any further with my log in. It shows up when ever I click on the Firefox App. I am using Windows 10, it seem like it has taken over the Firefox entry screen.