@ozsouth :-
Don't forget, Oz; for the current version of the PaleMoon-portable package, we're @ v33.5 ATM.
I use the non-AVX builds provided by Nuck-TH on the Pale Moon forum, in the "Contributed 3rd-party builds" section.....from here:-
https://forum.palemoon.org/viewtopic.php?f=40&t=27873
The SSE2 build is necessary for the big HP desktop rig, due to the Pentium 'Gold's' lack of AVX (deliberately crippled by Intel themselves). It's self-contained in its own directory, as always, along with an included, 'condensed' build of glibc-2.28 in the manner pioneered by watchdog some years back, and called in the same fashion. Packed as a ROX-app, you d/l, unzip, move it where ya like & just click on the ROX-app to launch it.
On the older - but new-to-me - Latitude E6430 in the front room, AVX IS present on the mobile Core-i5.....so I use a modified build of the portable with the 'mainstream' release instead.
(These are 64-bit only, I'm afraid. Nuck-TH has made it crystal clear he wants nothing to do with 32-bit.... I feel we must be grateful that there ARE folks who are willing to compile special builds for these alternate use-cases!) 
Mike. 