https://codepen.io/koutifaris/pen/NWbVNGW

Here it is. Works on FireFox, Chrome, and Microsoft Edge.

I've removed all the noisy code you added to your example.

Please use fewer word in your comments. Think as if the readers time were valuable…

As I’ve already written: this is a work around, and relies on a magic number, the max-height value. But it doesn’t require JS, which for me makes it indeed better.