Hello, in about:config, change the browser.newtab.url to about:newtab.

New Tab Page – show, hide and customize top sites

thank you

I have a similar problem with Yahoo! My home page was set to my Yahoo! Mail page, and every time I opened a new tab I got my home page. I've checked about:config and browser.newtab.url is correctly set to about:newtab. I ran Search Reset as suggested in another reply, all this has done is set my home page to the Yahoo! home page, and I get the same page when I open a new tab.

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Firefox/Tools > Add-ons > Appearance).

• Do NOT click the Reset button on the Safe Mode start window.

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

If you do not keep changes after a restart or otherwise have problems with preferences, see:

• http://kb.mozillazine.org/Preferences_not_saved

Thanks for that - it turned out that the culprit was an extension called My Homepage which opens the home page every time you open a new tab. I can't imagine why anyone would want to do this, and I've no idea how it got onto my laptop. Anyway I've now removed it and all works as expected.