https://libexp.herokuapp.com/
While it offers only a fraction of the functionality that the desktop version of Librivox Explorer had, my hope is that some will find it a useful tool for browsing the wonderful Librivox collection.
This is my first public announcement of the site, so we'll soon find out how much traffic it can bear before things might start to slow down.
As is always vital with these type of "third party" endeavors, it is important to accentuate that this new website is not an official Librivox endeavor. Any communications with regard to it should be directed to the email address displayed in the footer of every page on the site. I have been in touch with some of the LV admin staff to be sure that no aspect of the design of this new site will cause them any unintended grief. The new site makes minimal direct access to resources on the Librivox website; all cover-art images are pulled directly from the Internet Archive.
Happy browsing!!

p.s.: For any techies interested in the back-end code (Ruby and Sinatra), you can check it out on Github: https://github.com/dvimont/flatiron-bootcamp-sinatra-portfolio-project