Provides a button in the omnibar to hide the Reddit sidebar when browsing a subreddit. Specifically, any URL that matches " reddit.com/r/* " I created this so that nested comments would not squish when Reddit is open in a thin window. The sidebar will NOT be hidden on the Reddit homepage, because this sidebar does not interfere with Redditing. Some custom subreddit styles will stop the sidebar from being hidden. If you are using RES, you can solve this problem by unchecking 'Use subreddit style' in the sidebar.