Comment # 6 on bug 1207726 from Eric Molitor

Obviously I'm not on the hook to support this but I was genuinely surprised
when everything 'just worked' with the exception of Firefox. Even if you choose
to not officially support it I'd be dissapointed if Desktop Micro OS went away
on AARCH64 as an (unsupported) option.

Would you consider a revised version of the patch that just skipped Firefox on
AARCH64? FWICT Mozilla has been working to add CI support for AARCH64 Firefox
builds which will hopefully, someday, resolve this gap.