Hey Amanda
I tried bunch. Been using Mozilla Firefox for the last 2 yrs. I love it.
When I made my site I was using the preview in both firefox and IE. Since lot of people use IE. the setting I used for preview purpose only in IE is largest text under view text size option, that way I don't over lap anything as far as text/photos go.
In Mozilla there's a ;itt;e feature, if you press ctrl + it enlarges the page/ or ctrl- which decreases the page. If you use this feature. You will quickly realize that set ups are better than others when it comes to BV builder or any drag and drop website builder.
Okay now that I confused you. Good Luck...heh
Mike