Firefox has a complete UBo unlike the Chrom* corporateware turd which is just Microsoft 2.0 from Google. Chrome instead of IE, and propietary JS code for Google services such as Youtube -deliberately made slower in Firefox- as the new Active X shoved down your throat in order to keep a monopoly.

With Librewolf I can get proper WebGL, full UBo -with the AI blocklist too to avoid all the slop- and Bypass Paywall Clean from Giflic or whatever was called. Yeah, eh, y local newspaper won't mainly get adverts' money but the rest of local company ads show up well even with UBo/BPC, so they get some money after all.

On RAM usage, Librewolf it's far lighter on the long term and it doesn't ping back as Firefox, and many times less than Chrom* based browsers where, I repeat, Chrome based browsers don't allow UBo any more even if installed from their Github repo enforcing some about:flags variables related to legacy extension support.

The web today without UBo it's unmanageable. Popus, more than the ones from 2003, malware disguised as ads even on mainstream, safe sites, and all of these running zillions of cookies and trackers converting your -otherwise perfectly usable- old amd64 Celeron machine with 2GB of RAM into some crawling Pentium III with 256MB of RAM. With LibreWolf and UBo I could even test Yandex Maps with Prypiat and the like and InstantStreetView too. No slowdowns, no OpenGL >= 3.3/Vulkan video card required, and no need to own a 8GB machine.

HN developers there without UBo if they depend on the web for documentation they are bit screwed if they use Chrom* based browsers, sorry. Half of the resources for their machines coudn't be used, you know for IDE's, compilers, virtual machines/containers and whatnot. And, yes, I know about ZRAM under GNU/Linux, and just imagine how many tasks would anyone accomplish with a ZRAM compressed chunk (~1/3 of the physical RAM), a light desktop environment as Lumina/LXQT and a non-Chrom* browser blocking all pests. Up to 3X more tasks in the same machine. No need to waste money on upgrades, and compilng cycles are cut down for the good.