''locking this thread as duplicate, please continue at [https://support.mozilla.org/en-US/questions/1003008 /questions/1003008]'' I hope that this software mozilla firefox repairer. and increase the level of safety from malware attacks firefox I have some time, I repairer using methods Manage Search Engines and remove search engine of malware Snap.do and I also had some time to repair Home Page, it will happen again to change your home page in snap.do malware and I also use a manual method in the write-Adress like "about: config" and I have reset the antecedent malware infected, it will repeat the same malware infection