SUMMARY While watching YouTube music videos in Firefox, the audio volume level in the Audio Volume System Tray Applet changes to random values when a new video starts. STEPS TO REPRODUCE 1. Open Firefox. 2. Visit YouTube. 3. Start playing a music video. 4. Open the Audio Volume System Tray Icon (Applet? Plasmoid? Widget? - Not sure of the actual name of this thing). 5. Click on the Applications Tab. 6. Click on the Keep Open/Pin Button (the thumbtack/pushpin icon in the top right corner of the applet window) so the Audio Volume Applet stays open. 7. Click the next video button on the YouTube Video Player and let the video play for a few seconds. 8. Observe the volume level percentage. 9. Repeat steps 7 & 8 several times and notice the volume level percentage changes to a different random value almost every time you skip to the next video or the video changes on its own. OBSERVED RESULT When watching music videos on YouTube in Firefox, the volume level percentage changes to a different random volume level percentage on almost every change/skip to the next video and the change is visible in the Audio Volume System Tray Applet and also the change is auditorially (Actually hearing the music through your computer speakers with your ears) noticeable when 1 music video is playing and you manually increase the volume level percentage slider up to 100% in the Audio Volume System Tray Applet and then either skip to the next video or let the existing video finish playing and auto play the next video (when the next video starts, visually notice the change in the volume level percentage and also notice the difference in audio volume level by listening with your ears.) EXPECTED RESULT The audio volume level does not change at all and remains at what it was set to before. (Playing music videos on YouTube should not affect the volume level.) SOFTWARE/OS VERSIONS Linux/KDE Plasma: KDE Neon Testing Edition (ISO Dated: Jan. 19th, 2023) (available in About System) KDE Plasma Version: 5.26.90 KDE Frameworks Version: 5.102.0 Qt Version: 5.15.8 ADDITIONAL INFORMATION This problem also occurs on my KDE Arch Linux installation (KDE Plasma 5.26.5 Stable - KDE Frameworks 5.102 - Qt 5.15.8) on my computer. I don't believe this problem is Linux Distro specific. The YouTube Video Player's volume never changes and is always at 100% by default.
Created attachment 155465 [details] Video of Volume Level Bug Occurring
GIF image of issue: https://imgur.com/a/f1Jledp
possibly duplicate of bug 405963
(In reply to Patrick Silva from comment #3) > possibly duplicate of bug 405963 I do agree that my bug does sound similar, however I didn't find any mention of the almost completely randomness that the volume level changes to when a new video starts. Also, the last comment from Kai Uwe Broulik in that bug report mentions it being a possible pulseaudio bug, but I believe that my Arch Linux install is completely pipewire. Unless, Firefox and/or KDE still could be affected by their pulseaudio backend if there is one?!? I could be competely wrong or misunderstanding on this point though. By all means, please correct me on this if I got any of it wrong... LOL! :D
Pretty sure it's the same or at least has the same root cause. Thanks Patrick! *** This bug has been marked as a duplicate of bug 405963 ***