Your frame of mind is “dangerous”. If you are browsing on your servers as root, you need to not manage servers anymore. If that sounded harsh, learn about attack surface area first and then I might let you back in the server room.
You sir/ma’am hit it right on the head.
The “run root on Firefox” isn’t the issue, it’s the red flag. Security is a mindset. Failure to understand the core philosophy of why we have roles and permissions means you’re untrusted. It really isn’t personal. It’s security.