The website you're visiting runs using a "backend" called Web Dynpro. Web Dynpro does not support Firefox 5, and, "renders improperly in any browser but Internet Explorer (not compatible with Explorer 9)" (quoted from [http://en.wikipedia.org/wiki/Web_Dynpro here] ). Web Dynpro is proprietary software developed by SAP AG, and if this company decided to not create a website platform compatible with our browser, there's not much that we can do. You can use [https://addons.mozilla.org/en-US/firefox/addon/user-agent-switcher/ this addon] to fake the browser's name and version given to the website, or you may try using Internet Explorer inside Firefox by installing [https://addons.mozilla.org/en-US/firefox/addon/ie-tab-plus-self-hosted-versio/ this addon] . '''Attention''' : Addons aren't developed by Mozilla, so we can't provide full support to them, since every addon has a different creator, developer and code.