@Wiz57 / @greengeek :-
Nah, I can tell you exactly what the problem is, guys. It's the CPU on this HP desktop rig.....despite being a 9th-gen Core CPU - "Coffee Lake" architecture, from just 6 years ago - these later Pentium dual-core CPUs (this is a Pentium 'Gold' G5400) were deliberately "crippled" - by Intel themselves - through the intentional 'omission' of the AVX instruction set. The reason for this was simple; money. By leaving AVX out, they were 'pushing' users towards shelling out more dosh for a more capable CPU.
AVX is not "new". It's been around for well over a decade now, perhaps 12-13 years. But Intel left it out of the Pentium 'Gold' CPUs on purpose, in order to "aim" them further down-market at a specific user segment. Remember; at one time, Pentium CPUs were top-of-the-line, and were the best that Intel had to offer....but for years now, they've been downgraded to a 'bargain-bucket' budget special. They no longer have the exclusive 'cachet' they once possessed.
Despite that Steve is offering both GTK2 and GTK3 builds, he's still compiling with the standard Pale Moon source code.....and for several releases now (dating back to around March/ April last year), Pale Moon has been coded to require AVX to be present. This is why Nuck-TH has been offering the SSE2 builds for a while now.....for those people who, for whatever reason, haven't got AVX.
In every other respect, this G5400 is a 'beast'. It's powerful (quad-core with the H/T engaged), fast, very responsive, supports virtualization, DDR4 RAM.....for a Puppy box, you couldn't ask for more, BUT: it's just "missing" the AVX instruction set. Neither "official" Pale Moon, nor Midori, will run on this box. But both will happily run on my 13-yr old Dell Latitude I use in the front room when I keep Mama company in the evenings.......because the early Core i5 it's fitted with DOES have AVX.
And that's why I have to work-around the issue by using Nuck-TH's SSE2 build here on the HP. It's a hardware issue, unfortunately; no amount of software jiggery-pokery will fix it. You don't have AVX, those 2 browsers WILL NOT RUN. It's as simple as that. I didn't discover all this until after I'd bought this machine at the beginning of COVID.....my first-ever brand-new machine, a replacement for the faithful Compaq Presario I liberated from the recycling centre when my sister upgraded her computer to one with Win 7 built-in, many years ago.
(I do have a CPU replacement in mind if "push" comes to "shove". A Core-i5 8500 will do what I want; it's the exact same "Coffee Lake" architecture, and the same Socket 1151, but it DOES have AVX. And it won't break the bank, 'cos these things were NOT expensive to begin with.....though I'll reserve that step for if, as & when it becomes a necessity. In the meantime, I have a ton of other browsers I use more regularly anyway).
Mike. 