If we are talking about search technology Google is better by far. More sensitive, more relevant and more responsive. This then makes it the preferred choice for 85% of global searchers looking for something. This makes it the 'best' search engine in terms of optimizing a website for, for any webmaster.
Yes Google is best search Engine all over the world.Reason is that the response time and the relevance of the search.Other reason is that with firefox, it blocks those sites which contain malware which can harm our PC.