I guess its caused by ebay or maybe wetter24.de.
Now was the error message and ebay was active window in FF8 and wetter24 was in a inactive FF8 Window.
Btw, when i click on “Ignore” then the internet connection will stay. Only when using debug otion the internet connection will be blocked permanently.
Best regards

Edit: The Error Message come sometimes, no special internet site cause the problem, it happens on each website sometimes.