Firefox browser does not open when I click on the short cup. Instead it opens 2 small windows, one is a website I visited previously and the other is Firefox settings. Why is this happening? I have Windows 10 on my computer but that should not have anything to do with the Firefox browser or search engine not opening. When it opened the small screen that only showed Firefox settings I clicked it to open in full screen and now there is no option to make the screen smaller or exit the Mozilla support page. And, now with this full screen I can't even do a screen shot to show you what I am talking about. Does anybody know what is going on with this?