From computersnail at posteo.de  Thu Jul 23 12:04:57 2026
From: computersnail at posteo.de (computersnail at posteo.de)
Date: Thu, 23 Jul 2026 11:04:57 +0000
Subject: [Pkg-mozext-maintainers] Bug#1142642: Problem with Youtube on
 Firefox ESR with uBlock on Debian 12 bookworm
Message-ID: <0e44552d55e78167fe404fc72ad991d6@posteo.de>

Package: webext-ublock-origin-firefox
Version: 1.67.0+dfsg-1~deb12u1

I have a problem with Firefox ESR and uBlock on Debian 12:
If I want to watch a Youtube video, Youtube newly shows a white error 
message on dark gray background instead of the video, saying: An error 
occured. Please try again later. (Playback ID: QzN...)
In German: "Es ist ein Fehler aufgetreten. Bitte versuche es sp?ter noch 
einmal. (Wiedergabe-ID: QzN...)"
Reloading the page can help and you can watch the video after that! But 
that's not always the case.
Cleaning cache and cookie does not change the situation. The installed 
packages are as up to date as possible.
Does uBlock maybe need an update in the Debian 12 package repository?

The browser console shows two suspicious error entries:

XHR POST http://www.youtube.com/youtubei/v1/player?prettyPrint=false 
[HTTP/2 400]
XHR POST http://www.youtube.com/youtubei/v1/feedback?prettyPrint=false 
[HTTP/2 400]

root at deb12laptop ~ # dpkg -l | grep firefox
ii  firefox-esr                                   140.13.0esr-1~deb12u1  
              amd64        Mozilla Firefox web browser - Extended Support 
Release (ESR)
ii  firefox-esr-l10n-de                           140.13.0esr-1~deb12u1  
              all          German language package for Firefox ESR
ii  webext-ublock-origin-firefox                  1.67.0+dfsg-1~deb12u1  
              all          lightweight and efficient ads, malware, 
trackers blocker (Firefox)
root at deb12laptop ~ # dpkg -l | grep ublock
ii  webext-ublock-origin-chromium                 1.67.0+dfsg-1~deb12u1  
              all          lightweight and efficient ads, malware, 
trackers blocker (Chromium)
ii  webext-ublock-origin-firefox                  1.67.0+dfsg-1~deb12u1  
              all          lightweight and efficient ads, malware, 
trackers blocker (Firefox)
root at deb12laptop ~ # cat /etc/os-release
PRETTY_NAME="Debian GNU/Linux 12 (bookworm)"
NAME="Debian GNU/Linux"
VERSION_ID="12"
VERSION="12 (bookworm)"
VERSION_CODENAME=bookworm
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"
root at deb12laptop ~ # uname -a
Linux deb12laptop 6.1.0-51-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.177-1 
(2026-07-16) x86_64 GNU/Linux