There was only one topic for your user ID before, which you've marked as 'Solved' already. https://support.mozilla.org/en-US/search/advanced?a=1&asked_by=plomp789&sortby=1&w=2

het probleem is nog niet opgelost van de mails die niet allemaal in 1 keer zichtbaar zijn

I'd suggest you start a new topic and clearly describe your problem. https://support.mozilla.org/questions/new

Note, this forum is in English. If you're having difficulties writing in English, you can use Google Translate. https://translate.google.com/

Please don't mark a topic as 'Solved' when it isn't.

I Posted my problem in English, where is it now? I have to scroll to see all the mails and when I put the page in vertical I see only half the page