now worried about my Firefox browser. My banking is all I care about but will have to re-think this...

I like FF more than Safari...

Whenever Safari gives me grief, I switch to Firefox and the problem is solved.

All browsers, by their very nature, have insincerities that can be exploited. Fix one and create another.
I'm sticking with Firefox. The article has to do with the best and the brightest being paid to find flaws in software. All software will have flaws in them, especially if someone is being paid a lotta bucks to discover them.
Browsers, being software, are no exception. How many script kiddies can take advantage of any of these kind of flaws? I am not losing any sleep over this.

Its usage base has been on a continuous slide since 2010 (where it was once used by nearly a third of web users, the latest numbers put in the 18% range). It was years late to the mobile game and its mobile browser has since failed to gain traction outside of its hardcore cheerleaders. It's new mobile OS has barely elicited a shrug from the tech world, The browser is relatively slow and a bloated resource hog compared to its competitors. Tales of its bugginess abound, and even developers have been turning on it lately...Internet Explorer used to be a real thorn in developers side, but with Microsoft's apparent surrender on the "Standards Compliance" front in over the last few versions, Firefox has become the "pain in the ass" browser that developers struggle with nowadays (it's even picked up the nickname "Firefix", because you're going to have to fix all your damned code to get anything to display properly in it.) Most developers will tell you flat out that the two browsers that cause the most problems nowadays are IE8 (5 years old and 3 version out of date, but still stubbornly used by die-hard XP users), and Firefox (pretty much any recent release, on any platform). Most tellingly, one recent survey found that Firefox usage among the under-25's, who will be driving technology usage over the coming decade, was in the single digits, with Chrome and Safari absolutely dominating that demographic.

These security hole revelations certainly aren't going to help turn things around.

The problem isn't that Firefox has dropped the ball recently, but that they dropped it years ago and apparently forgot how to pick it back up.

I'm a Mac user, I don't like Safari, not crazy about using Chrome (I use Duck Duck Go or Startpage HTTPS) to avoid Google...hmmm

Chrome is fast and stable. I understand that a lot of people worry about their privacy, but it's trivially easy to block it from tracking you. Just to to "Settings" and make sure your browser isn't signed into a Chrome account. Then go under "Privacy" and turn off all of their helper features, like autocomplete, bug reporting and malware protection. These bring the browsers security in line with what you'd expect from Firefox and completely blocks Google from tracking your online activities.

If you really want to avoid Google, I'd suggest giving Maxthon a try. It's been around for 6 or 7 years now and has financial backing from some serious players and isn't going away any time soon. Importantly, it uses licensed rendering engines from both Internet Explorer AND Chrome, so it's capable of rendering any page that they can. Even more importantly, it was designed specifically for security and privacy. The founder of the company made a statement last year that it would be a waste of time for government agencies to try and subpoena data about the browsers users, because the system was specifically designed to prevent governments and corporations from spying on it. Everything that the company stores is encrypted, and the company doesn't keep the keys.

I don't use Maxthon myself, but if you really want privacy without giving up features, they have a Mac version (and a version for pretty much every desktop and mobile platform out there). The browsers users are a pretty loyal bunch.

Going to look into Maxthon.

Somehow I happened upon the Comodo browser and I use it sometimes. Presumably, hackers who seek to exploit browser vulnerabilities do a cost-ben analysis and direct their efforts where the time spent will do the most "good" (i.e. the most harm). If Comodo is used by many fewer people than the four major browsers named in the OP, is it therefore less likely to be attacked?