visible dotted grey line

Dear Support team,
all of a sudden there is a grey line visible when I click my logo, or the featured images. Is there a way to get rid of that?
All the best
Alex

Hey there,

I did a quick search on this, issue seems to be the browser.

here’s the solution I found.
https://support.mozilla.org/en-US/questions/1079934

Best Regards,
Support.