please check, it didn't work on new facebook

This works on the classic facebook not on the new facebook.

In options it says it requires Container Tabs and says to Disable it even though Container Tabs are actually Enabled. Not sure if this means it no longer works.

I like this product because I sometimes check my work account on a day off but don't want people to know and expect instant response. Only problem is that as it stands right now, I cannot tell if it is turned off or on?!? I used to be able to tell visually, but now both states look the same. If I can figure how to get it to show the difference again, I'll rate even better.