Zend certified PHP/Magento developer

How do I artificially boost the live sound in Windows for a specific tab in Pale Moon?

I’m watching a live stream on Twitch in Pale Moon. The Windows volume mixer is of course set to 100% for all programs. My headphones are connected to loudspeakers which are turned up all the way physically. But I can still barely hear the audio because the streamer has a bad mic/setup. This is a very frequent problem.

Trying to instruct each streamer how to get better/louder sound is exhausting. I need to “boost” that sound on my end somehow.

The solution cannot cost money or involve boosting all the audio for the entire system. That would sound awful for proper audio playing at the same time/in the background. It must be for a specific tab in a specific instance of Pale Moon.