I'm running on a 7th gen I5 on real hardware, usually a BIOS install.
Webengine I believe is,
L:\qt6-6.2.x\lib>bldlevel Qt6WebEn.dll
Build Level Display Facility Version 6.12.675 Sep 25 2001
(C) Copyright IBM Corporation 1993-2001
Signature: @#cmake build system:6.2.10#@##1## 24 Nov 2024 19:49:15 ARC
AOS-803C4C0::::0::@@WebEngineCore
Vendor: cmake build system
Revision: 6.02.10
Date/Time: 24 Nov 2024 19:49:15
Build Machine: ARCAOS-803C4C0
ASD Feature ID: 4C0
File Version: 6.2
Description: WebEngineCore
Mostly I use SeaMonkey and also Thunderbird, have to close Thunderbird if using Dooble but often keep SM open. I use NoScript in SM which helps keep the memory use down and more stuff to render.
Current memory with one tab in Dooble-Qt6, Thunderbird and SeaMonkey running,
L:\qt6-6.2.x\lib>mem /v
Total physical memory: 16,270 MB
Accessible to system: 3,502 MB
Additional (PAE) memory: 12,768 MB
Resident memory: 177 MB
Available virtual memory: 1,465 MB
Available process memory:
Private low memory: 257 MB
Private high memory: 2,000 MB
Shared low memory: 164 MB
Shared high memory: 459 MB