This is misleading. The majority of the site's features work correctly in any browser I tried. The page highlighted refers to a feature used to fill out the PDF

This is misleading. The majority of the site's features work correctly in any browser I tried. The page highlighted refers to a feature used to fill out the PDF application in your browser. If the application doesn't support your browser, you can download the PDF instead. This appears to be a stopgap until online enrollment is implemented. The copy is badly written and should be fixed.