Viewing the PDF version of an html file (sans images) in #Zathura, my favorite keyboard-friendly #PDF reader: 157.5 MiB RAM used
Viewing the same original html file (with images) in #dillo: 40.0 MiB RAM used
in #NetSurf: 74.6 MiB
in #GnomeWeb / #Epiphany: 397.0 MiB (wow, kinda lean!!)
in #Falkon: 541.1 MiB
The same file in #luakit: 623.1 MiB RAM
in #firefox / #LibreWolf: 1.31 GiB (YEP)