Windows 7 Tip: 
Piclens is a new plug-in for your Firefox and Safari browser that lets you launch into a full-screen into a slideshow while browsing photos. To use the software, move your mouse over an image and click the PicLens button that fades in. With one click, the image expands into full screen mode, where you can browse through the photos on the page in high resolution mode.
You can jump between photos or start an automatic slideshow by using the buttons at the lower-left. You can also press the space bar to play and pause the slideshow, or use the arrow keys to move between photos. Pressing any other key will take you back to the Safari browser.
You can click on a thumbnail in full screen mode to jump directly to that image. If there are more images than fit on the thumbnail strip, you can use the arrows to the left and right of the strip to scroll.
Will Safari crash after installing this plugin?