SiraUtil is a powerful utility mod which expands the capabilities and provides more tools to Beat Saber modders.
Probably! Many mods like ScoreSaber, Saber Factory, Custom Notes, and more depend on this mod for them to work, so don't uninstall it!
SiraUtil is a framework-like utility mod, but also brings some real features to the table.
FPFC Toggling: By default, when FPFC is installed and you use the fpfc launch argument, you will be able to toggle in and out of FPFC with G by default. That keybind can be changed along with other settings in UserData/SiraUtil.json.
Song Control: By default, when in a song, you can press Esc to exit the song, F2 to pause/un-pause, and F4 to restart. These keybinds can be changed in UserData/SiraUtil.json.