Unity3D WebGL custom responsive template with improved progress bar and build's auto-unzipper.
Inspired by this beautiful article
Unity 2017.1 and newer!
Created new template with almost same functionality (Unity 2017 doesn't expose loading stage other than loading/download percentage) based on Unity 2017.1 template. It might work on Unity 5.6 as well.
For progress bar, to work correctly, you should disable output build compression or unzip *.unityweb files (for Unity 5.5, I have script to do that).