Firefox views on one computer, not another

I have been creating my site in Firefox on my main laptop and everything looks good. I am very near going live so I thought I would check to see what my site looked like with IE, Chrome, Safari and Firefox on another computer.

I used my spare laptop and even though Firefox looks good on my main laptop, it looks real bad on the other laptop. (Fresh install of version 8.0) It seems as though the template is not there. There is no color in the background, all the buttons are gone, just the text that belongs in the button and all the side boxes are gone, just the text is there.

Site looks great on my iPad and iPhone.

My site is: Bonsai Tool Chest

Looks right to me in Opera, Chrome, FF3.6 and FF8.0
Actually I should say it looks the same to me in all those browsers, I don't know what "right" is supposed to be. The far edges are a light cute baby-puke green, main body a lighter yellower green, the tabs up top and on top of all the side boxes are gray with rounded top corners and some shading on the right hand side and the lettering in the tabs are a darker green than the green on the outer edge of the page.

Well, that is what it is supposed to look like. Any ideas why it looks way different on my Firefox? Is there a setting in Firefox that will allow CSS or java or something like that that might be turned off?

I haven't got a clue. The only reason the two versions are on my computer are so I can troubleshoot my own site. There are too many plug-ins with FF that seem to break things - like the firebug plug-in that screwed up my pop-up images. When they auto updated to the one that just kept freezing up (7.0 I think) I moved on to a better browser.
If you have the patience you can try comparing the two versions you have to see what settings are different, and then start turning on/off the different plug-ins until you figure it out.
(I should add - I'm assuming you wouldn't have turned the view page view to "No style" because there's just no reason for doing that.)