If a website fails to load when you try loading in Firefox Focus, you can always try to turn of the Tracker Blocker. The three dots on the top right of the screen on Android will show the blocker, which has a message under the "Trackers blocked," which states: "Turning this off may fix some site problems." I have no issues when attempting this on my Firefox Focus, so the problem may not be with Firefox Focus itself, but may be something with your connection, location, or otherwise.