If you find that Palemoon's drop-down menu is unreadable --like dark-grey text against a black background, for example see the screen shot here, https://www.forum.puppylinux.com/viewt ... 639#p74639-- you can thanks to peppyy for raising the issue and persisting until it was solved and bigpup for the solution, see viewtopic.php?p=74639#p74639 
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This summary is provided here in the hope it will be easier to find, if by no one else at least me as I keep forgetting it. 
Change the 'gtk-theme' used by Puppy. peppyy --and later, I -- installed the vicmz' theme collection from, https://distro.ibiblio.org/puppylinux/p ... 121106.pet then selected stardust from among that collection.
IIRC, it wasn't even necessary to re-start Palemoon. But, of course, it will be necessary to execute a Save to preserve that theme collection among Puppy's arsenal.
Please post any other usable gtk-themes you uncover. At least on my system stardust's black text against light grey background is readable, but not exciting.
- stardust gtk-theme.png (54.61 KiB) Viewed 807 times