Hey Kinghol,

Do you enable the Tracking Protection feature by chance? If that so, you may want to disable it for awhile to see if it may cause that problem.

As written in my first post it doesn‘t matter if privacy values are on or off! So no tracking protection is off!

Try clearing your cookies and chache. This article may help -> Clear browsing history in Firefox for iOS.

Be careful with this menu, though. You may want to try clearing the individual site data instead of from all sites.