Pulseaudio Ladspa Mixer and Firefox

[kennyheimbuch]

I have something going on with the sound in Firefox (73.0.1) on Debian 10. When I set the volume slider in the tray to 40% and then open Firefox, play a Youtube video and open the EQ and enable it, or vice-versa, open the EQ GUI, then open FF and play a video, it cranks the volume slider in the tray to 100%. (so it seems to take over the master). This happens with any preset.

However when I use any Chrome-based browser (or any other application like VLC etc), no such problem happens, it doesn't effect the master volume/volume slider.

I've also set to load the EQ Ladspa sink on startup after main sink loaded at the bottom of /etc/pulse/default.pa

When I don't run the EQ, and then run FF, it doesn't happen. Any ideas on what this could be?

[FFY00]

I am not sure why that would be happenning. I haven't touched in the project for some time, sorry.