Bug#858165: firefox: audio playback has stopped to work without pulseaudio

[Roman Tsisyk]

Package: firefox
Version: 53.0~b4-2
Severity: important

Dear Maintainer,

Audio playback has stopped to work in firefox-53.0~b4-2 when pulseaudio daemon is not installed.
Firefox shows "To play audio, you may need to install the required PulseAudio software".
This is a **regression ** since firefox-51.

I carefully read upstream bug report [1].  I don't have pulseaudio daemon installed and I don't plan to.
Please enable ALSA support for `firefox` package in order to provide the better user experience for Debian users.
Thanks.

[1]: https://bugzilla.mozilla.org/show_bug.cgi?id=1345661

-- Package-specific info:

-- Extensions information
Name: Application Update Service Helper
Location: ${PROFILE_EXTENSIONS}/aushelper at mozilla.org.xpi
Status: enabled

Name: Compact Dark theme
Status: user-disabled

Name: Compact Light theme
Status: user-disabled

Name: Default theme
Location: /usr/lib/firefox/browser/extensions/{972ce4c6-7e08-4474-a285-3208198ce6fd}.xpi
Package: firefox
Status: enabled

Name: Multi-process staged rollout
Location: ${PROFILE_EXTENSIONS}/e10srollout at mozilla.org.xpi
Status: enabled

Name: NoScript
Location: /usr/share/xul-ext/noscript
Package: xul-ext-noscript
Status: enabled

Name: Pocket
Location: ${PROFILE_EXTENSIONS}/firefox at getpocket.com.xpi
Status: enabled

Name: uBlock Origin
Location: ${PROFILE_EXTENSIONS}/uBlock0 at raymondhill.net.xpi
Status: enabled

Name: United States English Spellchecker dictionary
Location: ${PROFILE_EXTENSIONS}/en-US at dictionaries.addons.mozilla.org
Status: enabled

Name: User Agent Switcher
Location: ${PROFILE_EXTENSIONS}/{e968fc70-8f95-4ab9-9e79-304de2a71ee1}.xpi
Status: enabled

Name: Web Compat
Location: ${PROFILE_EXTENSIONS}/webcompat at mozilla.org.xpi
Status: enabled

-- Plugins information
Name: Shockwave Flash (25.0.0.127)
Location: /usr/lib/mozilla/plugins/libflashplayer.so
Status: enabled


-- Addons package information
ii  firefox        53.0~b4-2    amd64        Mozilla Firefox web browser
ii  xul-ext-noscri 2.9.0.14-1   all          permissions manager for Firefox

-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (990, 'testing'), (600, 'experimental'), (500, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.6.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages firefox depends on:
ii  debianutils               4.8.1
ii  fontconfig                2.11.0-6.7
ii  libatk1.0-0               2.22.0-1
ii  libc6                     2.24-9
ii  libcairo-gobject2         1.14.6-1.1
ii  libcairo2                 1.14.6-1.1
ii  libdbus-1-3               1.10.14-1
ii  libdbus-glib-1-2          0.108-2
ii  libevent-2.0-5            2.0.21-stable-2.1
ii  libffi6                   3.2.1-6
ii  libfontconfig1            2.11.0-6.7
ii  libfreetype6              2.6.3-3+b1
ii  libgcc1                   1:7-20170121-1
ii  libgdk-pixbuf2.0-0        2.36.0-1
ii  libglib2.0-0              2.50.2-2
ii  libgtk-3-0                3.22.4-1
ii  libgtk2.0-0               2.24.31-1
ii  libhunspell-1.6-0         1.6.0-1
ii  libjsoncpp1               1.7.4-3
ii  libnspr4                  2:4.12-6
ii  libnss3                   2:3.30-1
ii  libpango-1.0-0            1.40.3-3
ii  libsqlite3-0              3.13.0-1
ii  libstartup-notification0  0.12-4
ii  libstdc++6                7-20170121-1
ii  libvpx4                   1.6.0-3
ii  libx11-6                  2:1.6.3-1
ii  libx11-xcb1               2:1.6.3-1
ii  libxcb-shm0               1.12-1
ii  libxcb1                   1.12-1
ii  libxcomposite1            1:0.4.4-1
ii  libxdamage1               1:1.1.4-2+b1
ii  libxext6                  2:1.3.3-1
ii  libxfixes3                1:5.0.2-1
ii  libxrender1               1:0.9.9-2
ii  libxt6                    1:1.1.5-1
ii  procps                    2:3.3.12-3
ii  zlib1g                    1:1.2.8.dfsg-2+b3

firefox recommends no packages.

Versions of packages firefox suggests:
ii  fonts-lmodern          2.004.5-3
ii  fonts-stix [otf-stix]  1.1.1-4
ii  libcanberra0           0.30-3
ii  libgssapi-krb5-2       1.15~beta1-1
pn  mozplugger             <none>

-- no debconf information

-- 
WBR,
   Roman Tsisyk <roman at tarantool.org>
   http://tarantool.org/ - an efficient in-memory data store and a Lua application server