Ironically, my little C720 Chromebook running Chrome OS with 2GB of ram browses pretty decently as well. But it also only has 1366x768 of screen real estate to worry about...
This is a pretty sad state of affairs with the modern web.
I have an old Linux box running with 4GB of ram under my desk right now and it is borderline unusable for surfing the web with Chrome if I have any other applications open in the background. Firefox isn't as bad but it is also not a pleasant experience either.
At home, I have a laptop with 2GB of ram that I've upgraded to Windows 10 and the Windows Edge browser is also virtually unusable because of memory usage with more than a couple of tabs open.