[extragood]

I have to say that is precisely the opposite of my experience.

I held on to a 2012 4 GB MacBook Air until fairly recently as my casual web browsing machine. With such low system memory, I had to be extremely economical with my open tabs; no more than 3 or 4 at a time. The great suspender plugin helped until it became malware infested, and with that no longer an option, I moved to Firefox. The resource utlization improvement was immediately apparent and I haven't looked back, even after I finally updated my machine.