How to show a image preview of the files in IMCE file browser? I'm using the the imce module with the ckeditor module.

When you open the imce file browser to select/upload a image you can see a list of the images you have in your server.

This list shows the name for every image.

Is there a way to make this list to show a image preview of the image (a thumbnail)?

Look my capture:
I have seen it work sometimes, but I can not tell does not always work. I will recommend you opening an issue on the IMCE module page in Drupal.org. See it working on the image below: