Reader mode Firefox is my tool for that (on mobile too - never "upgraded" to Fenix).
I often open a news page or something and it's completely blank at first because so many scripts and assets got blocked by uMatrix. Before I actually unblock any domains, I try toggling reader mode on - a lot of times it's enough to let me read the plain HTML text which I actually wanted.
Oh, that's great to hear! Still not going to upgrade unless some extremely critical vulnerability comes out, though. Tab queue and uMatrix are both killer features for me.
I often open a news page or something and it's completely blank at first because so many scripts and assets got blocked by uMatrix. Before I actually unblock any domains, I try toggling reader mode on - a lot of times it's enough to let me read the plain HTML text which I actually wanted.