My firefox browser has a problem for first time. A few URLs in history are rapidly cycling through the address bar. The page scrolls automatically moveing my browser window to the bottom. Attempts to bring it back failed as it rapidly goes back to bottom. It is like the browser is being manipulated from outside. The problem is not present in Edge browser! I tried to open settings but the page doesn't display GENERAL menu choices, and is stuck to what's new. The rapidity of movement is like flickering due to a malfunctioning keyboard key stuck at some point. Any suggestions?