Go to the orange Firefox bar on the top left corner. Go to otions and go to settings and set your homepage. For the search engine you may need to disable the extension from the add-ons page but because I don't have it I don't know. Hope this helps!

Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.

You can try these free programs to scan for malware, which work with your existing antivirus software:

• MalwareBytes' Anti-Malware
• TDSSKiller - AntiRootkit Utility
• Hitman Pro

Further information can be found in the Troubleshoot Firefox issues caused by malware article.

_______________________________________________________________

after the removal use the search reset tool and delete a possible user.js file

• https://addons.mozilla.org/en-us/firefox/addon/searchreset/
• http://kb.mozillazine.org/User.js_file

Right-click on firefox icon and make sure there is no reference to delta search. Go to control panel and uninstall SafeSaver, Browser Protect or similar from there. Here a video guide what to uninstall. After that, go to about:config in FF and reset search/new tab settings