Contributed 3rd Party Builds • Re: Pale Moon x86-64 SSE2/AVX2

I would've expected for Pale Moon's build script(s) to detect CPU configuration in .mozconfig and automatically enable the --enable-libaom fallback if --enable-av1 was enabled in a SSE2 configuration, but that is not the case.

That would be assuming you're always building binaries on the machine you're going to use them on. And that's just not the case. Build machine CPU capabilities should have no bearing on the configuration. The builder determines the target configuration, not the hardware.