It stops the audio stream from being sent to your speakers/headset.
: Some versions of these plugins cause the Discord client to break, preventing users from switching voice channels without a full reload. ali0sam/Discord-Fake-Mute-Deafen-Plugin - GitHub discord fake deafen plugin
Currently one of the most popular mods, it often has "FakeDeafen" built-in as a simple toggle in the settings. It stops the audio stream from being sent
Various independent developers on GitHub maintain scripts like FakeDeafen.plugin.js there are concerns:
While the plugin may seem innocuous, there are concerns: