Do you use AdBlock? That makes a huge difference.
I just set up a new computer and I was wondering why Chrome and Firefox was so slow. Then I remembered I hadn't set up AdBlock yet.
I wonder if Mighty has ad blocking? It's an interesting question of which will be better for their business -- blocking or no blocking. (I won't try it because of the obvious privacy problems, because I use a fast computer, and avoid slow web sites. But it probably has an audience.)
I haven't found Chrome slow on my mid-range PC (i5-7500). Or my phone (Pixel 3).
I feel like I must be in some parallel universe to everyone else talking about how slow Chrome is.
Just now, I loaded the first 6 links on Hacker News. 1 didn't load at all due to a server error. The other 5 all loaded in under a second (measured by DOMContentLoaded). I have uBlock Origin enabled (only in Firefox on the phone). Maybe that helps.
I can have 100+ tabs open without slow down if I want to. The bigger problem is I'm less productive with 100 tabs open because... there are 100 tabs open. It's just too cluttered.
I'm willing to admit Mighty might be a good product if people have this problem with slow browsers. I just never found this was an issue. Maybe it's a problem on low-end machines, but how many people have a low-end computer but are willing to pay $50/month for Mighty?