Problem with firefox browser

I developed a web app in VS2010 using IE. The app works fine in IE but text is jumbled in Firefox. Can anyone suggest a fix for this problem which presumably is related to a programming issue.
Thanx

 

The URL is stgeorgepublishing.org

 

I designed my web application in Visual Studio 2010 using Internet explorer as my browser. When I try to run my web app in firefox All the text that is in Contentholders of my Master page get moved so they are on top of each other at the upper left corner of the Web page. The url of my web site is stgeorgepublishing.org
What can I do here to get these contentholders to be in their correct positions in Firefox as they are in IE?

Thanks
George Stefanidakis

 

Bruce, The URL of my app is stgeorgepublishing.org. In Firefox in any of the pages in this application that are based on a Master Page, the contentholders are pushed to the top-left of screen on top of each other and on top of some master page content. Thus, rendering those pages as unreadable. Pages on the site not based on the master page render correctly.

 

This is definitely some kind of style sheet compatibility issue. Difficult to say exactly what and where to look at.
First download your application on your local computer. Open your website with Visual Studio. Go to File/Browse With and choose Firefox. This way as you are designing your site you can view it directly with Firefox and modify it accordingly.

 

I am using Viosual Studio 2010. I opened my website in VS but I do not see File/Browse with on the the file menu. Is it necessary to have firefox installed on my computer for this to show up? I have simply been checking using BrowserLab to check what Firefox does.