Thank you for your work.
//In 2006-7 I tried on for size Puppy Linux, and even registered at the old Murga Forum. In those days Puppy Linux was a Slackware "derivative"
Back then Wolvix, GolblinX, Slax, still existed, so I used them for a few year; after that full Slackware.
Recently I acquired ($20.00) an HP T520 slim client
# inxi -F
System: Host: dark Kernel: 3.14.55 i686 bits: 32 Desktop: Fluxbox 1.3.7 Distro: Slacko Puppy 6.3.0
Machine: Device: desktop System: Hewlett-Packard product: HP t520 Flexible Series TC serial: MXL6470Y5H
Mobo: Hewlett-Packard model: 21EF v: 00 serial: MXL6470Y5H BIOS: AMI v: L41 v01.09 date: 10/19/2016
CPU: Dual core AMD GX-212JC SOC with Radeon R2E Graphics cache: 1024 KB clock speeds: max: 1200 MHz 1: 2: 800 MHz
Graphics: Card: AMD/ATI [Advanced Micro Devices ] Device 9856
Display Server: X.Org 1.14.3 drivers: ati,vesa (unloaded: radeon) Resolution: 1920x1200@0.0hz
OpenGL: renderer: Rasterizer version: 2.1 Mesa 9.1.7
Audio: Card-1 AMD [Advanced Micro Devices ] FCH Azalia Controller driver: snd_hda_intel
Card-2 AMD/ATI [Advanced Micro Devices ] Device 9840 driver: snd_hda_intel
Sound: Advanced Linux Sound Architecture v: k3.14.55
Network: Card-1: Realtek RTL8111/8168 PCI Express Gigabit Ethernet controller driver: r8169
IF: eth0 state: down mac: ec:8e:b5:d4:b8:58
Card-2: Intel Intel Dual Band Wireless-AC 7260 driver: iwlwifi
IF: wlan0 state: up mac: f0:42:1c:b3:e8:36
Drives: HDD Total Size: 8.0GB (44.0% used) ID-1: /dev/sda model: SATA_SSD size: 8.0GB
Partition: ID-1: / size: 7.4G used: 3.3G (48%) fs: ext2 dev: /dev/sda1
RAID: No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors: None detected - is lm-sensors installed and configured?
Info: Processes: 101 Uptime: 3:12 Memory: 457.2/3364.4MB Client: Shell (bash) inxi: 2.3.53
So I looked around for a suitable Linux. Slackware 14.1 wouldn't co-operate (the same Slackware that you used to make this Puppy). I tried a few other versions and flavours. Eventually I remembered Puppy ---I gave Slackware Puppy a try.
6.3.0 works out of the box ---video, sound, internet. 6.3.2 has some problems; 7.0 doesn't know what to do with this particular video card.
So, Slacko 6.3.0 it is. Now I needed a web browser (the Firefox that came with it is out of favour by most websites). I installed your development package, and compiled GTK-3.9.8. Firefox 89.0.2 works (and I am posting this feedback). I compiled/installed aPulse, so Firefox can speak.
//As I was looking around, I found out that Firefox 89.0.2 needs at least GTK-3.14.7 ---so the Firefox website says. This was news to me, because for a few years now I have been using Firefox 69.0, and recently upgraded (because of BitChute) to Firefox 89. I double-checked Slackware 14.1's GTK-3, and it is 3.8.2.
Your comment in your Puppy Remaster Program is to make "initrd/pup_ro2" directory and mount ....6.3.0.sfs there. I did, the process started up, but got stuck at estimating the space needed for the making of the modified .iso. So I used a memory stick and made a modified (GTK-3 enabled, &c) .iso that way.
KDE-3.3.2 works, (I don't use the desktop, only K3B-1.0.2); Fluxbox-1.3.7, XFE-0.88, RealPlayer 11, file-roller, eog, gRip-3.3.1, scrot, stardict-2.4.4, Xine, Ted, scite, roxterm.
# k3b -v
Qt: 3.3.6
KDE: 3.3.2
K3b: 1.0.2
# eog --version
Eye of GNOME Image Viewer 2.32.0