Pulseaudio: can't make the balance setting permanent

Unlike what I found here, the issue appears while listening to music via a browser only, and doesn’t affect Audacious. But my main music source is music.youtube.com.

In most cases the balance is shifted to the right. Adjustment done in pavucontrol works until the tune ends, and gets reset as soon as the next one starts. Does anyone have an idea on how to make balance settings permanent for a certain source (in this case, Firefox)?

Does pactl -- set-sink-volume @DEFAULT_SINK@ +5dB does what you need?

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This changes volume for both channels.

hmm maybe look at this then.
https://askubuntu.com/questions/1206146/maintaining-custom-left-right-audio-balance-i-e-ratio-when-changing-volume-le

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This is quite interesting, but I’m not even touching the volume setting.

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