I've got a bottom of the line 2013 macbook air. I closed everything down earlier to update to mojave, and firefox told me it would close 7 windows and 71 tabs. Never had a problem with it.
My main desktop is an ubuntu 16.04 machine with 16GB of memory and I've never had a slowdown, often get upto the 100+ tab range across different windows.
My main desktop is an ubuntu 16.04 machine with 16GB of memory and I've never had a slowdown, often get upto the 100+ tab range across different windows.