Firefox users like you and me considered as the most secure. According to new study Firefox offers the most secure browsing experience to its user. According to study paper called - Understanding the Web browser threat: Examination of vulnerable online Web browser populations and the "insecurity iceberg" :
=> Firefox users most likely to use the latest version and well secured from the Internet attacks.
=> Failed to update browsers will result in increases the chance for remote attacks executed by attacker.
=> Internet explorer security is bad because most users stuck with older version. Most people can't uninstall IE, therefore they end up using it outdated default browser version.
See study paper for all the details.