2) Enter: about:config
3) Enter: browser.newtab.url
4) Right click and modify
5) Enter: about:home
6) Close the tab, close Firefox
7) The next time you open a new tab you will get the Firefox search page and not lots of ads.
8) Another option is to set it to the Google home page. To do this use: https://www.google.com/?gws_rd=ssl
