At least for an LTS distribution (xenial here) I expect that an update of an essential program (like firefox) will NOT remove the support for the most basic linux audio interface (ALSA) so that audio is broken for those who rely on that interface.
Please re-enable ALSA support by compiling firefox with "--enable-alsa", see https://support.mozilla.org/hwsfp35778/board/message?board.id=Privacy-Security&message.id=1037477#M1037477
At least for an LTS distribution (xenial here) I expect that an update of an essential program (like firefox) will NOT remove the support for the most basic linux audio interface (ALSA) so that audio is broken for those who rely on that interface.
Please re-enable ALSA support by compiling firefox with "--enable-alsa", see https:/ /support. mozilla. org/hwsfp35778/ board/message? board.id= Privacy- Security& message. id=1037477# M1037477