Why "Ask.com" keeps setting itself as the default search engine? So far I have changed "Keyword:URL" to search with google, and remove ask.com in my default list, and even deleted the add-on associated with Ask.com , i.e., Tracker tools bar. After a day, Ask.com reset itself. For me, I consider that as a malware when it install itself. Mozilla should address this problem with Firefox, as no other search engines exhibit same behaviour. The auto installation is what bothers me! Thanks.