Makes an notification sound every time there is a new message on Twitch. The notification sound volume is linked to the player volume.
Remove some annoying divs that take up space in the chat field, to get more space in theater mode. The removed buttons can be restored by clicking on settings > open chat in popup.
Adds an overlay to the player with the buffer size. It also increases the speed of the player to reach the stream.
Tested on Firefox 123 and Tampermonkey 5.0.1. There are bugs to be fixed, but it is functional enough.