Hi, please try working through [http://malwaretips.com/blogs/trovi-removal/ Remove Trovi from Chrome, Firefox and Internet Explorer] by Malware Tips. After it is removed, you may need to reset you New Tab, home page and search, which you can do with [https://addons.mozilla.org/en-US/firefox/addon/searchreset/ SearchReset.] Alternatively, to reset the New Tab page ''only'': Type '''about:config''' into the address bar, press Enter, accept the warning, scroll down to '''browser.newtab.url '''and make sure 'Value' is set to '''about:newtab''' (right click > Modify, to change it if necessary, taking care not to alter anything else). You may then need to restart Firefox. ''If your question is resolved by this or another answer, please take a minute to let us know. Thank you.''