If you read the article, they mean they don’t support it only as a development tool.
Developers are supposed to be willing to download and install whatever tools they need to get the job done.
4ormat Login & Signup
Sorry, Internet Explorer doesn't support the technology used on the 4ormat administrative interface.
4ormat has been built using the latest web based technology, allowing you to modify your website with simplicity and ease. The administrative interface requires that extra kick that is only available on the browsers listed below. You will need to use one of the browsers listed here to create and modify your 4ormat website.
Keep in mind that all portfolio websites created with 4ormat work perfectly across all browsers as well as all versions of Internet Explorer.
Browsers we recommend:
If you don't, you should be out of business anyway.
Stupid people making stupid business decisions based on emotion. Not everyone will succeed.