In this short tutorial, I'll show you a quick trick using CSS to vanish those elements, allowing you to maximize your reading space, turn off distracting animations, and even vanish ads that make it past your blocker.
I'll actually be taking screenshots of this instructable as I write it, and the thing we'll be vanishing is the "Save Now" button on the Instructable builder. These instructions also work in Firefox, to the best of my knowledge.
Step 1: Right Click, Inspect Element
Step 2: Open the Styles Bar
Step 3: Type in Display:None
Step 4: The Element Is Gone
You can get it back by clicking the check box that appears when you hover over your new style, or by reloading the page.
While in Inspect mode, you can change a lot of things, including the styles and content of the live site you're looking at. Your changes to the page are temporary, and no one else can see them. It's an invaluable tool for debugging stylesheets and tweaking the layout of sites you build - also, just for goofing around.