I still remember when it was hard to convince people to use Firefox instead of Internet Explorer, reminds me of telling people that Chromium is the best browser now. :p
Internet Explorer < Opera < Firefox < Chromium/Chrome
edit
Chromium/Chrome with Adblock Plus and a subcription to the
malware domains list, Notscripts and the sandbox that the browser has makes it unhackable. The Better Popup Blocker extension gives it better popup blocking capability than Firefox. No popups ever. Not to mention the GPU rendering and web page prerendering you can enable with
about:flags, which makes the fastest browser even faster.