40-Hour Web App QA Sprint

I have set aside 40 dedicated hours to put my web application through a full quality-assurance workout. The build must perform flawlessly in Chrome, Firefox and Safari, so every finding has to be reproduced on each of those browsers... (Budget: $30 - $250 CAD, Jobs: JavaScript, JMeter, Selenium, Software Testing, Test Automation, Testing / QA, Usability Testing, Web Testing, Website Testing)