So this is possible... web-browser based audio processing as part of your signal chain.

PipeWire makes this extremely easy to setup, and Ildaeil on the browser with some pre-compiled plugins makes the magic possible.

So here output from Firefox goes into Chromium to give it some LV2 reverb, then into some native metering plugin, then to the speakers 😆

Feel free to try this at https://ildaeil.kx.studio/
But ***beware of feedback loop when enabling input***
The browser will use default input!