Hide "Hot Network Questions" sidebar on StackOverflow and other StackExchange sites
I wrote this extension after being tempted one too many times by the Hot Network Questions on StackOverflow. This extension will hide the sidebar on all StackExchange sites (let me know if you find sites it doesn't work on). You can click the tangled cat icon whenever you want to take a peek at the sidebar.
Steal the code! https://github.com/margold/nosidebar-stackexchange
The tangled cat icon was made by http://iconka.com/