I have a 27" iMac. When I open Firefox or Chrome browser windows, the information displayed fills the entire open browser window. But when I open Safari, there is a HUGE margin (about 3.5") on both sides of the browser window so that images and text are very small. The entire web page is so small that I have to switch to Firefox in order to read. Yes, I CAN increase the font size using Apple+, but this does not fill in the unused margins and it does not increase the size of the images. Instead, it makes it very difficult to read because lines will begin to overlap. Ideas? What is wrong with Safari? Is there a setting that is wrong?