I have observed many apps that show HTML such as Chrome and Steam have these 'helper' processes. These processes have been taking up insane amounts of RAM on my Mac. Applications such as Steam and Chrome will take up gigabytes of RAM. Most third party applications that have a helper process tied to it will render the computer unusable, and I'll have to reboot. The Unity Asset Store alone, when it's window is opened, takes up almost a gigabyte of RAM.
My Mac is running macOS Sierra, which you would think is the problem since it's a Beta, but the problem was present in earlier versions of OS X since Yosemite.