If you really want to use Vista on 4th gen Intel hardware, you could use the 32-bit edition which is not affected by the bug and works just fine. Although it limits you to just 3.5GB's of RAM.
The OpenGL driver from Catalyst 14.11.2 should also work, it's the last version of Catalyst that works on Vista with just a simple inf mod. Don't know whether it has any advantages over the 13.12 one though.
Nightly build 2023-07-18-09-25-38 is the latest one that works.
https://ftp.mozilla.org/pub/firefox/nightly/2023/07/2023-07-18-09-25-38-mozilla-central/