Try these threads. I suggest skimming through both before deciding how to approach it. [https://support.mozilla.org/en-US/questions/861279 How do I get rid of the tips messages that show up just underneath the search box? | Firefox Support Forum | Firefox Help] [https://support.mozilla.org/en-US/questions/856343 delete "be a web hero" make your mark" box on homepage | Firefox Support Forum | Firefox Help]