With Firefox 41 (and higher), it's no longer possible to customize the page shown in a new tab via changing the preference browser.newtab.url in about.config. Because of the fact that hijackers abused the preference in the past, Mozilla decided to remove it (see bug 1118285). Fortunately, by removing it, Mozilla also introduced a new API to bring this functionality back to life as an add-on. This add-on allows the user to choose a certain page in a new tab.

New Tab Override (browser.newtab.url replacement) https://addons.mozilla.org/en-US/firefox/addon/new-tab-override/

This is also available using Classic Theme Restorer (Customize Australis) {web link} Restore squared tabs, app menu, add-ons bar, small button view and more on Australis UI (Windows/MacOSX/Linux + Fx 29+).

On Firefox's new tab page, you should see a "gear" or "wheel" icon on the right side to manage what the page displays. This article has more info on that: Customize your New Tab page to hide or display content.

Do you have that new tab page or are you getting some other page?

Thank you jscher2000 that was a great answer and very fast to. Hope your day is a great one Roger

hi FredMcD I didn't try your answer because I looked at jscher2000 answer first and it worked. Thanks for getting back to me. Hope your day is a good one. Roger