I used to use Firefox and went to Chrome. I was having issues on multiple platforms and machines with Firefox slowing down and bogging the system. They all have their plus and minuses but Explorer was always way more minuses.
I don't like Chrome because of all the privacy issues. It tracks every web site you visit and sends all that data to Google. And you cannot shut that off. I am just not comfortable with that.
Firefox doesn't do that, and you have a lot of control over your privacy in that browser.