@cparke
Firefox or Chromium on a 486 is madness, there's no hope of that. elinks-nodep.tcz is a good web browser option for 486 except it doesn't do HTTPS. links.tcz should work if you have more patience and RAM. Also dillo.tcz and links-full.tcz if you have enough RAM to run X. I'm not sure about netsurf.tcz, and anything based on Firefox or Chrome browser engines (eg. Brave) will have vastly higher system requirements.
@Juanito
The patch applied for me on the latest kernel release, but "patch" wouldn't apply it to arch/x86/kernel/cpu/microcode/amd.c in kernel v6.12.11.
I'm not that good with "patch", there might be options that will make it work. Since the function that's changed is identical I copied the changed lines over manually. It might also be different if you use Git, which I'm even more lost with.
I can look back at it again if you really want, but I just deleted all the kernel building stuff from my VPS to save space last night since I thought nothing more was happening with it!