Seems to be broken in Unity version 2020.1.0b5.
Viewing post in (Unity) Better Minimal WebGL Template comments
tested it out in 2020.1.0b5 and can reproduce the issue: looks like unity isn't replacing any of the template tags when creating a WebGL build. looks like they've changed how that build process works, unfortunately without updating the documentation; will dig into it some more and try to have a fix up soon
I'm getting the following error using the template on Firefox:
The resource at “https://www.google-analytics.com/analytics.js” was blocked because content blocking is enabled."
It's true that I have content blocking enabled as per default in Firefox. This makes the game start take a couple of seconds longer. I assume this is because the template tries to contact Google in vain. As most players are pretty hectic nowadays, some of them might think the game doesn't work and close the browser so it would be great if you could add a check for potential content blocking. Thanks!