In Firefox 13 through 40, there is a hidden setting for the new tab page. Please note that this setting is ignored in Firefox 41 and later.

(1) In a new tab, type or paste about:config in the address bar and press Enter. Click the button promising to be careful.

(2) In the search box above the list, type or paste newtab and pause while the list is filtered

(3) Double-click the browser.newtab.url preference and enter your preferred page:

• Page thumbnails (default) => about:newtab
• Blank tab => about:blank
• Built-in Firefox home page => about:home
• Any other page => full URL to the page

Press Ctrl+t to open a new tab and verify that it worked. Fixed?

Hi, also have a look at How to set the home page and make sure that in 'Home Page' there is only your new home page's URL, and no reference to Gumtree - if there is, delete it.

If you are still having a problem, delete all references to Gumtree, as shown under the heading 'How do I remove a single website from my history?' in this article - Delete browsing, search and download history on Firefox.

If your question is resolved by this or another answer, please take a minute to let us know. Thank you.

Thankyou so much to your replies i now have it working Thankyou Thankyou