If features on a webpage don’t work
If some of the features of a webpage don’t work, such as audio or animation, you may have turned off some utilities that help Safari handle special content on webpages.
To turn webpage features back on:
Choose Action menu > Preferences and click Security. (The Action menu is near the upper-right corner of the Safari window, and looks like a gear.)
Make sure this checkbox is not selected: “Block pop-up windows.”
If the steps above don’t help, you may need a plug-in application, which is a small program that assists Safari and adds to its capabilities.
You can also choose Action menu > “Report Bugs to Apple” to report the problem.