STEPS TO REPRODUCE 1. Open link1, play video and make sure video volume is at 100%. 2. In the application volume panel, Firefox is shown to be playing at 100%. 3. Open link2, play video and make sure video volume is at 100%. 4. In the application volume panel, Firefox is shown to be playing at 48% (or at least not 100% like it's supposed to). Link1 https://www.youtube.com/watch?v=5yzvNA-hZhQ Link2 https://www.youtube.com/watch?v=kQ0N2s2hfWo OBSERVED RESULT Widget volume slider doesn't match the media actual volume level. EXPECTED RESULT Widget volume slider should match the media actual volume level. SOFTWARE/OS VERSIONS KDE Plasma Version: 6.2.1 KDE Frameworks Version: 6.7.0 Qt Version: 6.7.3 FireFox version: 131.0.2 (64-bit) (pre-installed with openSUSE tumbleweed)
While doing more research on the behavior I noticed that the application slider in the applet was changing every single time I clicked another video on YouTube. e.g., Watch video1 with stream slider is at 100%, applet slider is at 58% Click video2 on the same page, stream slider is at 100%, applet slider is now at 67%. Click video3 on the same page, stream slider is at 100%, applet slider is now at 49%.
Please attach a screenshot of the slider in question.
This slider changes when a new video is loaded from the same page, in sequence. The stream slider is at 100% but the one from the screenshot varies from video to video. If a video sets the applet volume at 80%, it will also be 80% for that one. Same for other videos. I have a feeling that it's interpreting a particular value from the video. When it happens, the only way to truly have the volume at 100% is to max the applet slider since the stream slider is already at 100%. https://i.imgur.com/6UmjvIZ.png
Created attachment 175276 [details] applet slider
Looks to me like a firefox bug. Chromium doesn't exhibit this behavior. The volume also gets displayed correctly, according to pactl the stream is not at 100%.