Yeah I did that and there was no side bar button when show/hide was selected. And nobody on any of the reddit complaints from the last few days was able to show where it was either and kept getting annoyed that people couldnt find it.about:config was...
Please God get rid of this. This was 100% a terrible idea. Im not trying to be rude, Im really not. But as a web developer it gets in the way. Even trying to close it does not work.