If features of a webpage don’t work, options that help Safari handle special content may be turned off.
Choose Safari > Preferences, then click Security.
Make sure these checkboxes are selected: Enable JavaScript, Allow WebGL, and Allow Plug-ins.
Make sure this checkbox isn’t selected: “Block pop-up windows.”
If the features still don’t work, you may need a plug-in. Look for a placeholder on the webpage, such as “[Plug-in] blocked for this website,” then click it for more information.