OSCommerce Website Fixes

Dear Freelancers, I manage a website called [login to view URL] - An ecommerce store based on the platform OSCOMMERCE. I require a freelancer to complete the following tasks: 1.) Make the website compatible across all modern browsers. At present the website falls apart on Mozilla Firefox. 2.) Ensure that the website is 100% Secure from hackers etc and provide firm evidence of this. 3.) Create a light grey image of our logo at the bottom of the page to blend in with the background. I wish for this work to be completed very quickly, and expect bids of $30 from reputable freelancers with experience and feedback. Best Regards, Joe Adams