So, issue is pretty self-explanatory. Say, whenever I want to upload a photo on e.g Facebook, the window that opens does not allow me to view thumbnails for my pictures and since I have hundreds of them it is kind of a time consuming process trying to find the one I want. Is there a way to view thumbnails in that window? File manager shows thumbnails just fine...

Thank you for any insight into how I am supposed to deal with this.