The site unter https://www.wetter.de/deutschland/wetter-bremen-18220609.html won't be displayed correctly. I get errors like this: please see the image! Anyone able to help out?

Seems the image won't came with..

'nother try…

Let me boot my 10.13.6 mac.

Here is what I get. see screenshot Where is your screenshot? Did you try Firefox in Safe Mode? https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode

Tried troubleshooting mode and a complete fresh installation of Firefox. Issues look like this (trying to upload another screenshot)

Sorry, can't upload a screenshot! :-(

The site is having issues uploading screenshot. Make the image is small, well under 1mb. You can use this site and post a link here. https://paste.opensuse.org/ Make sure to pick image file and for "Delete After" pick something like 3 months. On mac I have to always reduce the image size in the viewer that opens when looking at screenshots. I took a screenshot of my desktop, but had to reduce the size by changing the Fit into pixel option. see screenshot

Also clear your browser cache. https://support.mozilla.org/en-US/kb/delete-browsing-search-download-history-firefox