d/rust-1.49.0-x86_64-1.txz
Until we can figure out why audio crashes if we compile Firefox using
rust-1.50.0, it's probably better to stick with this version.

xap/mozilla-firefox-78.8.0esr-x86_64-3.txz
Recompiled with rust-1.49.0 to prevent crashing on any tab with audio.