Hi HalfABubble, are you going to the home page --

https://www.duolingo.com/

-- or a specific page within the site?

Does the home page load for you?

I notice the site uses a CloudFront server for some of its content. For example, this is the first style sheet address when I load the home page:

https://d35aaqx5ub95lt.cloudfront.net/css/ltr-e3cf191c.css

Can you check to make sure that server isn't being blocked by Firefox's Content Blocking feature or any of your add-ons:

Double-check content blockers: Firefox's Content Blocking feature and extensions that counter ads and tracking may break websites that embed third party content (meaning, from a secondary server).

(A) Do you see a shield icon toward the left end of the address bar, near the lock icon? More info on managing the Tracking Protection feature in this article: Content Blocking.

(B) Extensions such as Adblock Plus, Blur, Disconnect, Ghostery, NoScript, Privacy Badger, uBlock Origin or uMatrix should provide toolbar buttons to manage blocked content in a page. There may or may not be a number on the icon indicating the number of blocked items; you may need to click the button to see what's going on and test whether you need to make an exception for this site.

Hello Jscher2000,

Prompt Reply - Thank You The Home Page does not load There is no shield icon. When viewing the site information:

  Connection = Secure Connection
  Content Blocking = No Blockable content detected on this page
  Permissions = you have not granted granted this site any special permissions

Any other ideas?

If you don't mind getting a little nerdy, could you open the Network Monitor tool in the lower part of the tab, using either:

• "3-bar" menu button > Web Developer > Network
• (menu bar) Tools > Web Developer > Network
• (Windows) Ctrl+Shift+e

Then reload the page in the top part of the tab (Ctrl+r or use the reload button). Firefox should start listing all the files it is requesting, along with information about whether the request was successful.

• 200 = successful fresh or cached retrieval
• 301 or 302 = redirect to different URL
• 304 = server confirmation to use cached file

Do you see a lot of failed requests?

the 'little nerdy' reply - have sent you email (carrferrell) with a screen print of the information displayed using the Network Monitor tool, with a yield of: 200, 304, 304, 304, 304, 200 & 200

Subject Line : Screen Print Result of Network Monitor - duolingo page refresh

The scripts that show a size of zero bytes should definitely not be so small (comparison screenshots attached). Do you use any security software or add-ons that could be filtering out the contents of those scripts?

In another thread, the user reported that Norton Safe Web is causing the issue:

https://support.mozilla.org/questions/1252910#answer-1204613

Spot On - Thank you - I too will send a note to Duolingo.