If you are using the DuckDuckGo Privacy Essentials add-on, it could be blocking some ad or tracking content in pages. Is its button visible on the toolbar? (You can move an add-on button from the drop-down list to the toolbar using the steps in the following article: [[Manage your extensions using the extensions button in the toolbar]].) Sometimes an add-on will put a little badge on its button when it is blocking content on the current page. Even if there's no badge, you could click the button to see what it tells you it is up to. It's also possible that the page doesn't like Firefox's built-in Enhanced Tracking Protection feature blocking trackers in the page. Whether you decide to make an exception is up to you and of course you can change your mind at any time. To make an exception, while you are on the page, click the shield icon at the left end of the address bar (next to the lock) and then click the first slider switch. Can you get the page working? P.S. This site doesn't accept email replies, please follow up in your question here at https://support.mozilla.org/en-US/questions/1420416