Yes, I checked it now, on both my laptop and a smart phone. Wow !
It took just 1 second to load the entire page, in spite of carrying so much data. Credits to your webserver.
A couple of little things, that remain:
1. The search.png file needs to be copied to the new index.html folder. Once copied, the "Browse TCZs" page should display this icon on the left edge of "Search in all Fields" text box.
2. The version "a" of this script/index.html can extend as a Wiki Page named "List of Extensions" and will contribute to Users/Maintainers in different ways.
BTW, Congrats on getting this implemented, at such a rapid pace.