Nice addition. Just FYI, there is a bug with the Steem Monsters tab:
Once the Steem Monsters tab has been clicked, it is no longer possible to switch to another tab without refreshing the browser; the Steem Monsters tab contents remain in front.
However, if another tab is clicked, the newly clicked tab becomes highlighted yet its contents remain hidden.
Notice in the above image that I have clicked the Comments tab, yet its contents remain hidden.
Windows 10, Chrome browser Version 69.0.3497.100 (Official Build) (64-bit)
This seems to have resolved after I posted this. Not sure if I had anything to do with it, but thanks for the fix!