You will need to rebuild any AUR Python packages that install files to site-packages or link to libpython3.13.so.
Print a list of of packages that have files in /usr/lib/python3.13/ :
pacman -Qoq /usr/lib/python3.13/
Rebuild them all at once:*
pamac build $(pacman -Qoq /usr/lib/python3.13)
Use rebuild-detector to see if anything else needs to be rebuilt:
checkrebuild
* It’s recommended to clean your build cache first with pamac clean --build-files
Info about AUR packages
AUR (Arch User Repository) packages are neither supported by Arch nor Manjaro. Posts about them in Announcements topics are off-topic and will be flagged, moved or removed without warning.
For help with AUR packages, please create a new topic in Support > AUR and a helpful volunteer may be able to assist you.
FYI, librewolf 153.0.3_1-1 was just added to the Arch repos. The AUR package had an epoch set which was removed, so one will need to manually install the repo version to replace the AUR version.
I suspect this is because Tor, which is based on Firefox, depends on libavcodec.so.62, just like Firefox and Zen Browser. However, ffmpeg was updated to version 9.0.5 in the “unstable” repository and provides libavcodec.so.63.
The solution for me was to install ffmpeg4.4 in addition, since a downgrade wasn’t possible due to too many dependencies.
Yes, Librewolf completely stopped playing videos with a no codec error.
Injecting 1 themes. logger.ts:24:18
Client credentials loaded. logger.ts:24:18
Hls.js is not supported in this browser. logger.ts:24:18
HLS.js does not seem to be supported. Cannot fallback to built-in HLS logger.ts:35:18
VIDEOJS: ERROR: (CODE:4 MEDIA_ERR_SRC_NOT_SUPPORTED) HLS.js does not seem to be supported. Cannot fallback to built-in HLS
Object { code: 4, message: "HLS.js does not seem to be supported. Cannot fallback to built-in HLS", MEDIA_ERR_ABORTED: 1, MEDIA_ERR_DECODE: 3, MEDIA_ERR_NETWORK: 2, MEDIA_ERR_SRC_NOT_SUPPORTED: 4 }
peertube-player.js:2886:44
Fallback to web-video. logger.ts:24:18
VIDEOJS: ERROR: (CODE:4 MEDIA_ERR_SRC_NOT_SUPPORTED) No compatible source was found for this media.
Object { code: 4, message: "No compatible source was found for this media." }
peertube-player.js:2886:44
Fatal error in player
Object { code: 4, message: "No compatible source was found for this media." }
logger.ts:45:23
Cannot play media. No decoders for requested formats: video/mp4;codecs=avc1.42E01E mp4a.40.2, video/mp4;codecs=av01.0.01M.08, video/mp4;codecs=vp09.00.50.08, audio/mp4;codecs=mp4a.40.2, audio/mp4;codecs=fLaC, application/vnd.apple.mpegurl, video/mp4
It’s reproduced in Brave, I’ll see what needs to be rebuilt when I have time. Tor is probably dead too, but I haven’t checked yet. On YouTube, everything died too.
Installing ffmpeg4.4 solved this.
The installation was successful, all data remained in place.
❯ sudo pacman -S librewolf
resolving dependencies...
looking for conflicting packages...
:: librewolf-153.0.3_1-4 and librewolf-bin-1:153.0.1_1-1 are in conflict. Remove librewolf-bin? \[y/N\] y
Packages (2) librewolf-bin-1:153.0.1_1-1 \[removal\] librewolf-153.0.3_1-4
Since a few days a Timeshift snapshot (using rsync) takes a long time to complete. Usually around 22 seconds, it now takes more than 90 seconds. Maybe related to rsync vs. 3.50 ?
/var/log/pacman.log:[2026-08-17T10:34:54+0200] [ALPM-SCRIPTLET] Checking if target drive has enough free space for a snapshot (RSYNC)
/var/log/pacman.log:[2026-08-17T10:35:02+0200] [ALPM-SCRIPTLET] Creating new snapshot...(RSYNC)
/var/log/pacman.log:[2026-08-17T10:35:02+0200] [ALPM-SCRIPTLET] Syncing files with rsync...
/var/log/pacman.log:[2026-08-17T10:35:13+0200] [ALPM-SCRIPTLET] RSYNC Snapshot saved successfully (19s)
/var/log/pacman.log:[2026-08-17T10:35:36+0200] [ALPM] upgraded rsync (3.4.4-1 -> 3.5.0-1)
/var/log/pacman.log:[2026-08-18T13:56:33+0200] [ALPM-SCRIPTLET] Checking if target drive has enough free space for a snapshot (RSYNC)
/var/log/pacman.log:[2026-08-18T13:57:06+0200] [ALPM-SCRIPTLET] Creating new snapshot...(RSYNC)
/var/log/pacman.log:[2026-08-18T13:57:06+0200] [ALPM-SCRIPTLET] Syncing files with rsync...
/var/log/pacman.log:[2026-08-18T13:58:12+0200] [ALPM-SCRIPTLET] RSYNC Snapshot saved successfully (98s)
update 22-08: downgraded to rsync 3.4.4-1 and snapshot takes 21 seconds to complete.
You will need to rebuild any AUR Python packages that install files to site-packages or link to 
AUR (Arch User Repository) packages are neither supported by Arch nor Manjaro. Posts about them in Announcements topics are off-topic and will be flagged, moved or removed without warning.