1) Endianess issues on top-bar browser-buttons as you can see on image, the buttons stay white than black.
2) Power9,10,8 patch is conflict to power5 patchset, so this make firefoxppcbe-on-power5 hung on booting after get compiled because nss-vsx binaries.. Firefoxppc64be autoenable and force NSS / * by makefile to use hash-sha512-and-mcrypto hard accel vsx on power5 compilation. So nss by hard-accel / mcrypto only supported by vsx which power5 lack, however i not sure if firefox nss mcrypto hash-sha512 is compatible to power-4.5.6.7 vmx hard accel requirements, but it will be nice to support full nss/ to vmx even vmx-emulated than software.
So all the problem about is from here: security/nss/lib/freebl
1) That theming issue only impact BE variant (which is not supported nor tested by Mozilla team). It is unrelated to my JIT work. Having said that I am going to try my best to see if I could find out why and lodge a bug ticket with Mozilla
EDIT: I think I found the root cause. The RenderCompositorSWGL has issue on BEEDIT: I've fixed the issue, you can simply download the updated patches from GitHub Releases
2) I will see what I could do