So I can do that by selecting side bookmark folders (Covid, VoteFraud") and then click "Open All". And my setup will render all of those in less than your 30 seconds because I'm not stuck with a slowerer rendering engine like as in the legacy FireFox.
I run multiple 4K 50" monitors. have 12 core (24 with hyper-threading) CPU, 64GB ram, and don't like even 2 or 3 inches wasted on each browser window. You must not run a lot of really, really big "stuff", in both memory, CPU, and screen space.
That is not what I said. You want to open a bunch bookmarked pages and copy a list of about 200 allegations of voter fraud as formatted (hot linked) and then paste them render accordingly? That is hardly a comparison to having one page handy which provides them all. You could have one bookmarked but finding one when you have a lot and opening it is a lot slower than just opening the tab.