CSS and Firefox?

I'm pretty new to Web development and didn't know that you should never really design your website/app using IE. I've heard that Firefox is the best to use when it comes to designing a website. My question is this, is their a site that shows what the CSS differences are between Firefox and IE?

My website looks fine in IE but certain HTML Table cells are displaying differently.

Thanks,

You're best off designing and testing in Firefox, Chrome, Opera, and Safari. Once your site is working in those browsers you can move onto fixing it up so older versions of IE don't make it look so horrible. Use Conditional Comments to provide a separate stylesheet for IE.

If you aren't already doing so, I would recommend starting all sites with the HTML5 Boilerplate, which is a HTML5 template designed by the web's top front-end developers.

Also look at installing some developer tools for Firefox, in addition to the built-in tools already available in Firefox, Chrome, and Opera.

EDIT: This stuff should be in the sticky at the top of the webdev forum :( The stuff in that post is horribly out of date with links to w3schools, and not a single link to anything jQuery related.