https://www.cnet.com/news/chrome-firefox-rein-in-memory-hogging-websites/

You might have noticed that browsers impose an increasingly onerous burden on your phone or laptop. Websites are getting bigger and browsers are getting features that make them more like full-fledged operating systems than mere document viewers.

One example, this Google Doc I'm typing in right now is using 218MB of my memory. No wonder even 16GB of memory on a laptop a starting to feel cramped.