Forum not working properly in Firefox

Hello dear people from SDL,

I feel your latest update to the Community Web UI needs a little rework.
If I open any question and want to search other questions from there, it is hardly possible from within Firefox.

To clarify, I present two simple screenshots. First Chrome:

search bar in chrome

And now Firefox:

search bar in firefox

If you look closely, you might barely notice the lower tip of the "y" from the last placeholder word "Community" juuust beneath FF's bookmark bar. I can actually click up there and start typing. I cannot see what I type, but the suggestions do pop up:

it is kind of funny but then again not. Can you please check this?

Thanks & kind regards,