Just to let you know, I'm not one of these guys that installs every single add-on or extension out there to my browser. I'm very picky and only like to add things that are practical. Well, I've found one recently that has been a HUGE help and best of all, it's very simple. It's called Screengrab! and here's what they say about it on their site:

"Basically Screengrab! let’s you take what you want from a web-page: the entire scrollable document, just the visible bit, or a draggable selection. Screengrab will even save just the contents of an individual frame."

It actually does what it says, it allows you to take a screen shot of just the browser contents while eliminating the surrounding browser. It has basically three options under two categories. You can copy the complete page or frame, just the viewable area or select a specific portion of the page to copy by drawing a simple box. The other section gives you the same options but instead of just copying, it saves them straight to a .png so you can skip pasting them into Photoshop altogether!

My old trick was using "ALT+prt sc" instead of just plain old print screen. In case you didn't know, that allows you to copy just the active program you are in instead of the entire screen. It's pretty helpful, but you still have to go and crop out the browser window or whatever. I got frustrated the other day and thought, "You know, some dude out there has to have made some kind of plug-in or something to let me just copy the content of the browser instead of the whole dang thing." Sure enough, the people, or person at Screengrab! made my day.

Give it a shot, I highly recommend it. Here's the link again: http://www.screengrab.org/home/