Hi, Please see [https://bugzilla.mozilla.org/show_bug.cgi?id=762938 this]. You can try changing '''browser.newtab.url''' to '''about:newtab#''' or suffix a space etc. (see comment 21) in [http://kb.mozillazine.org/About:config about:config] # In the [[Location bar autocomplete|Location bar]], type '''about:config''' and press '''Enter'''. The about:config "''This might void your warranty!''" warning page may appear. # Click '''I'll be careful, I promise!''', to continue to the about:config page. [http://kb.mozillazine.org/About:config_entries about:config Entries] The [https://services.addons.mozilla.org/en-US/firefox/discovery/addon/config-descriptions/ Config Descriptions] add-on adds helpful source comments in about:config. [https://www.mozilla.org/en-US/firefox/16.0.2/releasenotes/ Release notes]