Package: firefox-esr
Version: 140.7.0esr-1+b1
Severity: normal
Dear Maintainer,
After recent updates on Debian Testing, Firefox ESR doesn't seem to be using
system FFmpeg for media decoding anymore.
In about:support#media, Codec Support Information / Software Decoding shows:
AAC: Unsupported
H.264: Unsupported
HEVC: Unsupported
As a result, websites requiring AAC, H.264 or HEVC cannot play videos.
Other codecs (VP9, AV1, Opus, Vorbis, MP3, FLAC) are supported.
ffmpeg on the system can decode AAC correctly, and ffmpeg -codecs shows AAC
decoder available.
The issue has been tested on the same machine with:
- Firefox ESR from Debian Testing, clean profile, no extensions
- Firefox ESR from Debian Unstable
Both showed the same result: AAC/H.264/HEVC unsupported.
While Firefox ESR from Debian Stable works correctly on another machine:
AAC/H.264/HEVC shown supported, videos play flawlessly.
Steps to reproduce:
1. Install firefox-esr from Debian Testing repositories.
2. Open "about:support#media".
3. Check "Codec Support Information".
Expected result:
AAC and H.264 should be supported when ffmpeg is installed.
Actual result:
AAC, H.264 and HEVC are shown as Unsupported.
Thank you for your attention,
Alex
-- Package-specific info:
-- Addons package information
-- System Information:
Debian Release: forky/sid
APT prefers testing
APT policy: (500, 'testing'), (300, 'stable-updates'), (300,
'stable-security'), (300, 'stable'), (100, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 6.18.12+deb14-amd64 (SMP w/20 CPU threads; PREEMPT)
Kernel taint flags: TAINT_WARN
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8),
LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages firefox-esr depends on:
ii debianutils 5.23.2
ii fontconfig 2.17.1-5
ii libasound2t64 1.2.15.3-1
ii libatk1.0-0t64 2.59.1-2
ii libc6 2.42-13
ii libcairo-gobject2 1.18.4-3
ii libcairo2 1.18.4-3
ii libdbus-1-3 1.16.2-4
ii libevent-2.1-7t64 2.1.12-stable-10+b2
ii libffi8 3.5.2-3+b1
ii libfontconfig1 2.17.1-5
ii libfreetype6 2.14.1+dfsg-2
ii libgcc-s1 15.2.0-13
ii libgdk-pixbuf-2.0-0 2.44.5+dfsg-4
ii libglib2.0-0t64 2.87.2-3
ii libgtk-3-0t64 3.24.51-4
ii libnspr4 2:4.38.2-1
ii libnss3 2:3.120-1
ii libpango-1.0-0 1.57.0-1
ii libstdc++6 15.2.0-13
ii libvpx12 1.16.0-3
ii libx11-6 2:1.8.13-1
ii libx11-xcb1 2:1.8.13-1
ii libxcb-shm0 1.17.0-2+b2
ii libxcb1 1.17.0-2+b2
ii libxcomposite1 1:0.4.6-1+b1
ii libxdamage1 1:1.1.7-1
ii libxext6 2:1.3.4-1+b4
ii libxfixes3 1:6.0.0-2+b5
ii libxrandr2 2:1.5.4-1+b4
ii procps 2:4.0.4-9+b1
ii zlib1g 1:1.3.dfsg+really1.3.1-3
Versions of packages firefox-esr recommends:
pn libavcodec61 | libavcodec-extra61 | libavcodec60 | libavcodec-extra <none>
60 | libavcodec59 | libavcodec-extra59 | libavcodec58 | libavcodec-
extra58 | libavcodec57 | libavcodec-extra57 | libavcodec56 | libavc
odec-extra56 | libavcodec55 | libavcodec-extra55 | libavcodec54 | l
ibavcodec-extra54 | libavcodec53 | libavcodec-extra53
Versions of packages firefox-esr suggests:
ii fonts-lmodern 2.005-1
pn fonts-stix | otf-stix <none>
ii libcanberra0 0.30-20
ii libgssapi-krb5-2 1.22.1-2
pn pulseaudio <none>
(Other packages that seem relevant to me:
ii ffmpeg 7:8.0.1-3+b2
ii libavcodec62 7:8.0.1-3+b2
)
-- no debconf information
