Abacab is absolutely correct. If you do any type of web browsing, you need a good virus protector. In the past few years, people have come up with ways to exploit websites through various means and install malicious code that can launch scripts that with intentions of taking over your computer, installing viruses, cryptolocks, etc.
Here's the thing that people tend to not think about: not all attacks are known or executed right away. A virus protector will only protect you from things it knows to pick up. Black hats have always been one step ahead and in many cases, especially if someone is trying to obtain passwords and credit card information, you won't even know it's happening or when. It's not uncommon for them to sit on the information for a good amount of time before actually using it; especially where things like credit card theft is concerned.
If you think that even the popular and well known sites are safe, you're mistaken. They have higher security but they are not immune to these kind of attacks.
For my browsing computer, not only do I use virus/malware protection, I also have a script blocker on my browser (noscript), adblocker (uBlock Origin) and a tracker block (Ghostery). I also have a VPN. Even with all this, to believe I'm 100% secure would be a mistake.
I personally use Avira but I got a free year of Bitdefender so put it on the studio to try out. I personally still prefer Avira but that's just my personal preference. I only usually browse when getting updates on the studio if I need to go direct to a site.