Make sure you are not blocking content.

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?

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

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}acking-protection-firefox-desktop

i tried the troubleshot mode but didnt work. Cleaning with CCleaner all Firefox stuff worked this time. I even thought the problem was the RAM disk im using for Firefox cache...

Thank you Francesco

That was very good work. Well Done. Please flag your last post as Solved Problem as this can help others with similar problems.

must use Edge to open the site

The problem is back with the Iliad website!! when i clean cookies i log in normally and i can get access to the personal area. But the second time i access the area, i can't, i press and it goes in and out fast, like neverending, and in the cronology i see the address get added many times! the cookies get corrupted everytime?

A post was flagged as Solved Problem. If the problem is not solved, please remove that flag. If you don’t, others that can help may not read this post.

Go to that message, and use the Undo link to its right.