Stylish is a Firefox or Chrome extension that customizes the appearance of web-pages that you browse. That is, Stylish lets you "Theme" or "Skin" pages you visit by allowing you to overwrite CSS styles.
Chat room description and tags may only be useful a first couple of times you come by a chat room. After that, they are just wasting space. To hide them from the view, you can install the following…
Because some like it like that:
This Stylish script:
Hides the recently added bold category titles;
Removes post vote counts;
Reduces space used by widget.