This article was pretty bad, that being said I'm a sysadmin and I never left Firefox for my main browser. I'll tell you how and why it's done. FF's sandboxing isn't as good as chrome so the security risk is minimally higher but I've found their memory management is better and I like the extension selection more than that of any other browser so I'm not switching any time soon. I wouldn't consider browsing without noscript, adblock plus(I'll let other people beta test uBlock for me), and cookie whitelist with buttons. That's just good security right there to reduce the attack surface plus a lot less annoying annoyance from ads and tracking. I wouldn't want to browse without RES, tab mix plus, and greasemonkey those are all just solid extensions. I have my uses for DownThemAll and FlashGot, and with my touch screen Grab and Drag and QuickDrag are super handy. I've had basically all of these for ages, well before some of their clones made it into chrome. Some of the options even still just aren't as good on chrome (cookie whitelist is just better).
On my gaming rig and in secure work environments I don't have java or flash in my browser and I toss firefox into sandboxie to give me another layer of protection. Between my 'wouldn't browse without' list and sandboxie I've never had anything malicious escape. While some of you are thinking 'but I've never gotten infected and I don't use a bunch of that stuff'... just because you haven't found an infection doesn't mean you don't have one. I'm a sysadmin who has to clean up that crap so I've got a bit better idea what I'm looking for than most. I have a number of other scanners and manual tools which I occasionally use to double check that nothing's gotten through but generally don't need to run those passively hence don't need to take up memory and IOs in the background. For those thinking but how do you do porn without flash, that's on my personal laptop, and again sandboxie to keep any infection potential limited. I don't always use sandboxie for reddit because it messes with purple/blue links at times and I've got the rest of everthing locked down well enough (no flash, all the good security extensions etc) that I think I can get away with it. Also I don't do it on my secure gaming or work machines.
As a backup browser for troubleshooting compatibility issues I use chrome in sandboxie with adblock plus, scriptsafe, and vanilla cookie manager (not nearly as good as cookie whitelist, but it'll do in a pinch).
As a backup backup I use iexplore in sandboxie. Sometimes website developers are stupid and nothing else renders it properly.