Please provide a public link (no password) that we can check out. No Personal Information Please !

Make sure you are not blocking content.

https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop also see https://blog.mozilla.org/security/2021/03/23/introducing-smartblock/

https://support.mozilla.org/en-US/kb/smartblock-enhanced-tracking-protection

Diagnose Firefox issues using Troubleshoot(Safe) Mode {web link}

A small dialog should appear. Click Start In Troubleshoot(Safe) Mode (not Refresh). Is the problem still there?

Many site issues can be caused by corrupt cookies or cache.

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.

• Delete cookies to remove the information websites have stored on your computer {web link}

• How to clear the Firefox cache {web link}

Please provide a public link (no password) that we can check out. No Personal Information Please !

Do you mean Duolingo's website? This: https://www.duolingo.com/learn

I already tried troubleshoot (safe mode), and the problem is still there.

I also tried to delete cache, and Duolingo's cookies (just their cookies)

And the part under; Make sure you are not blocking content ?

And the part under; Make sure you are not blocking content ?

I crossed out the tracking protection, and the problem is still there.

Have you checked the speaker by trying another website?

Have you checked the speaker by trying another website?

Of course, any website works fine.

I called for more help.

I called for more help.

Thank you!