Firefox may block parts of a site because it identifies them as trackers. To unblock this "solid content": Look for the Shield icon in the address bar to the left of the URL. Toggle the Enhanced Tracking Protection

System Settings > Network > Advanced > DNS, then add new DNS servers.

Most importantly, use these tools responsibly. The ability to unblock websites is powerful—use it to expand your access to information, protect your privacy, and overcome legitimate technical barriers, not to violate rules or laws that serve important purposes.

This starts Firefox with all extensions disabled and default settings.

What do you see when trying to open the site?

Type about:config in Firefox’s address bar and click “Accept the Risk and Continue.” Search for each of the following preferences:

Look for the to the left of the URL address bar.