Hi, do you mean a welcome page from Mozilla about your latest Firefox update, that kind of page? Sometimes your startup/home page may be set to more than one tab or to the wrong tab. To set the page back to what you want, try the steps in the following article: [[How to set the home page]]. Even after that, when Firefox does a major update, it's normal to get a page about that, which should just appear one time per update and not every time you start Firefox.