Are you talking about the home page? https://support&#46;mozilla&#46;org/en-US/kb/how-to-set-the-home-page Or the search engine? Type '''about:preferences#search'''<enter> in the address box&#46; You can select any search engine to be your default from here&#46; You can also remove any engine from here&#46; New Tab Settings https://addons.mozilla.org/firefox/addon/new-tab-override/ https://support.mozilla.org/en-US/kb/customize-new-tab-page https://support.mozilla.org/en-US/kb/hide-or-display-content-new-tab