> For me this page render instantly. i5 2500K, 16 GB RAM on Linux (I do have some aggressive tweaks).

My machine: Intel(R) Core(TM) i7-6850K CPU @ 3.60GHz, 128 GB RAM on Ubuntu Linux 20.04.

> My mouse has additional buttons for these.

Similar. As a sibling post mentions, the history hijacking does some nasty stuff -- unless you're lucky or something, I guess.